Endorphins assists in a. regulating eating behavior and how we respond to stress b. movement and attention c. muscle action and memory d. learning and attention

A. regulating eating behavior and how we respond to stress

Explanation:

Endorphins, also called happiness hormones, are chemicals produced by the body itself that are structurally very similar to opioids  but without their negative effects. These natural chemicals produce strong analgesia, stimulate the pleasure centers of the brain, creating satisfying situations that help to eliminate discomfort and decrease painful sensations. When we feel pain, endorphins act as endogenous pain relievers, inhibiting the transmission of pain to the brain.

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation:

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation: