An Asian clam, a fresh water creature, is usually less than 50 millimeters.
It tends to be small and light-colored, with a shell ornamented by distinct, concentric sulcations, anterior and posterior lateral teeth with numerous fine serrations. It resides in brackish to freshwater rivers, lakes, streams, canals and reservoirs. This creature lies on or is slightly buried in materials such as sand, silt, or gravel-bottomed places. It usually prefers running water with high oxygen levels and has no tolerance for polluted or near-freezing water.
Plants use carbon dioxide in a process known as photosynthesis. During photosynthesis, plants give off oxygen as a waste product. Carbon dioxide moves from the air into the leaves of plants through tiny openings in the plant's leaves. Oxygen moves out of the plant leaf through these same openings.
Ovulation is the release of a mature egg from the surface lf the ovary. This usually occurs mid cylce, around 2 weeks or so before menstruation. During the follicular phase
Before the animal is harmed they spray to keep the predator away
C is your answer :)
Hope it helps!