The correct answer is b) Connect and relate them with each other.

Number sense refers to a child's understanding and familiarity with numbers, their relationships, and their magnitude. It involves the ability to work with numbers flexibly and to make sense of mathematical concepts. Number sense is a foundational skill that children develop in their early years, and it is crucial for their future success in mathematics.

There are several ways in which number sense allows children to connect and relate numbers with each other:

1. Understanding Quantity: Number sense enables children to understand the quantity represented by a number. For example, a child with strong number sense will understand that the number 5 represents a set of five objects or a quantity of five.

2. Recognizing Number Patterns: Number sense helps children recognize patterns in numbers. They can identify and understand that numbers have a certain order and that there are relationships between them. For instance, children with good number sense can recognize that counting by twos gives them even numbers.

3. Comparing and Ordering Numbers: Number sense allows children to compare and order numbers. They can determine which number is greater or smaller and understand the concept of more or less. This skill is essential for understanding concepts like addition, subtraction, and place value.

4. Estimating: Number sense helps children develop the ability to estimate quantities. They can make reasonable guesses and approximations about the size or amount of something, even without counting it exactly. Estimation is a valuable skill that supports problem-solving and mental math.

5. Problem Solving: Number sense enables children to solve mathematical problems. It helps them understand the relationships between numbers and apply strategies to arrive at solutions. By connecting and relating numbers, children can approach problems with confidence and flexibility.

In conclusion, number sense allows children to connect and relate numbers with each other. It helps them understand the quantity, recognize patterns, compare and order numbers, estimate quantities, and solve mathematical problems. Developing strong number sense in children is essential for their overall mathematical understanding and success.