Which of these describes a population? a. all the organisms that interact in a lake b. all the gray squirrels that live in a forest c. an area characterized by a group of plants and animals d. a nonliving factor in an organism’s environment is it b?

Yes, it is B, because A population is
 a sum of all the organisms of the same group or species.

Yes, your answer is B. All the grey squirrels that live in a forest. 

No because the eaeht is on a 23.5 degree axis tilt and so when it is winter the northern hemisphere is pointing away from the sun and the soutubern hemisphere is pointing toward the sun

the glands which are associated with each description is given below:

pancreas - is an endocrine and exocrine gland that secretes juices with enzymes for digestion. salivary glands- with protection and digestion in the mouth. liver- secretes bile for digestion.   lachrymal glands - secrete tears to moisten eyes and protect them from particles and infection.   sweat gland -regulates water, salt, and temperature. oil glands - to form a protective barrier on the skin.   goblet cells - secrete mucus for protection.