Dominique is helping her friend Kaley learn to do a handstand on the gymnastics mat. To help her friend master this skill, Dominique helps her maintain her balance. Over Kaley’s base of support, Dominique needs to guide her

A.Center of gravity
B.fulcrum
C.primary lever
D.secondary lever

The correct answer is A. Center of gravity.

To understand why center of gravity is the correct answer, let's first break down the options and define each term:

A. Center of gravity: The center of gravity is the point in an object or person where the entire weight can be considered to act. It is the point where all the body's mass is concentrated.

B. Fulcrum: The fulcrum is the pivot point around which a lever turns or is supported. It is the point at which a lever or system balances or the point at which something balances or is supported.

C. Primary lever: This term is not directly related to maintaining balance in this scenario. A primary lever refers to a simple machine consisting of a rigid bar that pivots on a fixed point called a fulcrum.

D. Secondary lever: Similarly, this term is not directly related to maintaining balance in this scenario. It may refer to a compound machine made up of multiple simple machines, including levers.

In the given situation where Dominique is helping Kaley learn to do a handstand, the most significant aspect is maintaining balance. Dominique needs to guide Kaley's movements to ensure that she does not fall or lose her balance.

Maintaining balance involves managing the distribution of weight and the position of the body's center of gravity. The center of gravity is the equilibrium point where the weight distribution of an object is balanced. In the context of a handstand, it is crucial to maintain the correct alignment of Kaley's body over her base of support, which is the area in contact with the gymnastics mat.

Therefore, the correct answer is A. Dominique needs to guide Kaley's center of gravity over her base of support to help her maintain balance while learning to do a handstand.

My answer A.