What does oxidation involve?
a. a loss of electrons
b. a gain of electrons
c. a loss of oxygen
d. a gain of hydrogen

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.

because the light is a great source of energy for the plants to survive. (i hope this )