Rosalyn's arms felt tired and fatigued after she held her cousin's baby for a few minutes. what area of fitness does she need to improve?

I found the missing choices, these are: 
Cardiorespiratory endurance
Body composition
Flexibility
Muscular strength

Rosalyn's area of fitness that needs to improve is MUSCULAR STRENGTH. 

Muscular strength is defined as the amount of force a muscle can produce with a single maximal effort. In Rosalyn's case, she needs to develop her arm muscles to enable her to hold her cousin's baby without feeling any fatigue.

It's more opinion based, so it really depends on your personal views of the topic of religion, there is no wrong answer, with the exception of irrelevant answers.hope that .

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