How does a coat keep youwarm in winter?
a. it heats you up.
b. it prevents your body heat from escaping into the air.
c. coats are hot.

it prevents your body heat from escaping into the air.

In particular wintertime, we frequently wear coats.

Coats help keep us warm due to the stuffing inside the materials.  The coat retains the body warmth in. This capacity to keep heat in is what keeps us warm.It traps air inside it which warms up ultimately due to your body temperature

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.