Lines of Symmetry in a Square
The correct answer is option 'C', which is 4 lines of symmetry for a square. Let's delve into the explanation below:

Definition of Symmetry
Symmetry is a concept in geometry that refers to a shape or object that can be divided into two or more identical parts that mirror each other. Lines of symmetry are imaginary lines that divide a shape into two symmetrical halves.

Symmetry in a Square
- A square is a four-sided polygon with all sides equal in length and all angles equal to 90 degrees.
- A square has 4 lines of symmetry, which means it can be divided into 4 equal parts that are symmetrical to each other.
- The lines of symmetry in a square run through the midpoint of each side and intersect at the center of the square, forming right angles.

Explanation of 4 Lines of Symmetry
- The first line of symmetry runs horizontally across the middle of the square, dividing it into two equal halves.
- The second line of symmetry runs vertically from top to bottom, also dividing the square into two symmetrical parts.
- The third line of symmetry runs diagonally from the top left corner to the bottom right corner, creating two more symmetrical sections.
- The fourth line of symmetry runs diagonally from the top right corner to the bottom left corner, completing the 4 lines of symmetry in a square.

Conclusion
In conclusion, a square has 4 lines of symmetry due to its symmetrical properties, making it a shape with equal halves when divided along these lines.

A square has 4 lines of symmetry, two diagonals, and two axes (horizontal and vertical) through its center.