The phrase and diagram represent an important law in science. That is

A) energy on Earth is transferred to Earth by radiation.
B) matter is never created or destroyed; it only changes form.
C) all matter has an attractive force that is dependent on its mass.
D) energy is never created or destroyed; it only changes form.

c. all matter has an attractive force that is dependent on its mass

the dark variety, as they are not visible on the dark tree barks

explanation:

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.