1.B. Enzyme,2.A. Epiglottis,3.D. Stomach,4.D. Nephrons,5.B. Filtering the blood to remove wastes,6.A. Amino Acids,7.<span>A. Protein</span>
Muscular endurance is how many times can your muscle repeat the same activity before getting tired. Weight lifting is a good way to work up your muscular endurance.
I believe the best choice will be option 3