What is CAD Software?
Computer-Aided Design (CAD) software is primarily used for creating detailed drawings and models in both 2D and 3D formats. It is widely utilized in various industries including engineering, architecture, and manufacturing.
Key Functions of CAD Software:

• Creating 2D Models: CAD software allows users to design flat representations of objects, which is essential for blueprints and architectural layouts.
• Developing 3D Models: Users can create realistic three-dimensional representations of objects, enabling better visualization and understanding of complex shapes and structures.
• Precision and Accuracy: CAD tools provide high precision, which is crucial for engineering designs where exact measurements are necessary.
• Design Modifications: Changes can be made easily to designs, allowing for quick iterations and improvements without the need for manual redrawing.
• Simulations and Testing: CAD software often includes features for simulating how designs will behave under various conditions, which is important for testing before production.
• Documentation: It aids in creating detailed documentation and specifications that are vital for manufacturing and construction processes.

Conclusion:
In summary, CAD software is an essential tool for creating, modifying, and analyzing designs in a digital format. Its ability to facilitate both 2D and 3D modeling makes it invaluable across various fields. Therefore, option 'B' is the correct answer as it accurately reflects the primary purpose of CAD software.

- Creating 2D and 3D models: CAD software allows users to create precise and detailed 2D and 3D models of objects, buildings, and structures. It provides tools for drawing, editing, and manipulating geometric shapes, lines, curves, and surfaces.
- Designing and engineering: CAD software is extensively used in various fields such as architecture, mechanical engineering, civil engineering, industrial design, and product development. It enables professionals to design and engineer complex systems, components, and structures.
- Visualization and simulation: CAD software provides visualization capabilities, allowing users to view their designs in a realistic and virtual environment. It enables them to simulate and analyze the behavior, performance, and functionality of their designs before they are physically built.
- Collaboration and communication: CAD software facilitates collaboration among design teams by allowing multiple users to work on the same project simultaneously. It also enables easy sharing and communication of design ideas, concepts, and specifications.
- Manufacturing and production: CAD software plays a crucial role in the manufacturing and production processes. It generates accurate and detailed manufacturing drawings, specifications, and documentation required for the production of parts and assemblies.
- Automation and customization: CAD software can automate repetitive tasks and workflows, improving productivity and efficiency. It also allows for customization and parametric modeling, where changes made to one part of the design can automatically update related parts.
- Integration with other software: CAD software can integrate with other software tools and systems. For example, it can interface with computer-aided manufacturing (CAM) software to generate toolpaths for machining, or with analysis software for structural and thermal analysis.
- Archiving and documentation: CAD software provides features for archiving and documenting designs, ensuring that design data is securely stored and easily retrievable for future reference or modifications.
Overall, CAD software is a powerful tool that revolutionizes the design and engineering processes, enabling professionals to create precise, efficient, and innovative designs in various industries.