Fibrous Root:
- Fibrous root is a type of root system found in some plants, including grass, monstera, and banyan tree.
- In this type of root system, the primary root is short-lived and gets replaced by a large number of thin, branched roots.
- These roots arise from the base of the stem and spread horizontally in all directions, forming a dense network of roots.
- Fibrous roots do not penetrate deep into the soil but remain in the upper layers, providing stability to the plant and helping in absorption of water and nutrients.

Primary Root:
- Unlike fibrous roots, primary roots are the main root of a plant that grows directly from the seed.
- Primary root provides anchorage to the plant and is responsible for the absorption of water and nutrients from the soil.
- In some plants, such as grass, the primary root is short-lived and gets replaced by fibrous roots as the plant matures.

Root Hairs:
- Root hairs are small, finger-like extensions of the epidermal cells on the surface of the roots.
- These hairs greatly increase the surface area of the root, which enhances the absorption of water and minerals from the soil.
- Root hairs are the primary site for water and nutrient uptake in plants.
- They are delicate structures and have a short lifespan, but they continuously develop near the growing tips of roots.

Adventitious Roots:
- Adventitious roots are the roots that arise from any part of the plant other than the primary root.
- In some plants, such as monstera and banyan tree, adventitious roots develop from the stems or aerial parts of the plant.
- These roots provide additional support to the plant and help in absorption of water and nutrients.
- Adventitious roots are especially important in plants that grow in challenging environments, such as those with limited access to soil or in waterlogged conditions.

Conclusion:
- Grass, monstera, and banyan tree have different types of roots.
- Grass has a fibrous root system, where the primary root is short-lived and replaced by numerous thin, branched roots.
- Monstera and banyan tree have adventitious roots that develop from the stems or aerial parts of the plant.
- All these plants also have root hairs, which greatly enhance the absorption of water and nutrients from the soil.

Answer : adventitious roots