Answer:
Secretion, in biology, production and release of a useful substance by a gland or cell; also, the substance produced. In addition to the enzymes and hormones that facilitate and regulate complex biochemical processes, body tissues also secrete a variety of substances that provide lubrication and moisture.
Explanation:
A warning sign. cross road ahead. Slow down look carefully in all directions
The food web shows who eats who or what and the pyramid ranks them
A change in the substance by temp, color,