Question

cardiorespiratory endurance measures...? *
the ability to do a moderately strenuous activity over a period.
the proportion of fat in your body compared to your bone and muscle.
the elasticity of your muscles.
the ability to do 10 pushups
flexibility is a measurement of...? *
how fast you move a body part.
the ability to move a joint through its full range of motion.
the ability to move a weight a consecutive amount of times.
the ability to exert maxim force with a given muscle.

Explanation:

Cardiorespiratory endurance is about sustained moderately strenuous activity. Flexibility is about joint range - of - motion.

Answer:

Cardiorespiratory Endurance: The ability to do a moderately strenuous activity over a period.
Flexibility: The ability to move a joint through its full range of motion.