Questions are in the attachments I’ll give a brainlist

menstruation

it is the shedding of endometrium layer of uterus in females

it is a cycle of 28 days and menstruation occurs in first 5 days of cycle

if female is pregnant then there ia no menstruation

mensturation

Explanation:

if the unfertilized egg pass out of the female body then mensturation occurs but if the egg fertilized with the men's sperm the fertilized egg travels through the fallopian tube to implant itself into the uterus.And finally women is considered pregnant.

the answer is tropical areas. the tropical areas obtain more

radiant energy from the sun than they lose to space through terrestrial

radiation, and vice versa for polar areas. earth has an energy remaining in the

tropics and an energy scarcity for the polar areas.

explanation:

b - the respond is innate and varies over time.

good luck!