Fat under the skin (a) chemical messenger (b) structure of cell membranes (c) insulation

Good question. A lipid made of a phosphate group and two fatty acids; consists of a hydrophilic polar head and two non-polar hydrophobic tails; forms cell membranes. Many of this type of lipid serve as chemical messengers or as parts of the cell membrane; examples include cholesterol, testosterone, and estrogen

I think the answer would be  B.

Hope it helps lol

b) is correct

Explanation:

because cell membrane is mainly composed of lipids (fats)

it is a learned trait

explanation:

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )