Answer quickly im being timed : ) which structure in plants produces a substance that protects the extending roots from developing friction? (a) root cap (b) stele (c) stem (d) epidermis

The correct answer is (A) root cap.

Root develops from radicle during germination of seed.  Root tip consists of apical meristem which divides to form new cells for the growth of root. Since root tip is very tender and is protected with a multilayered cap called root cap. The surface of the root cap is covered with mucilage which  protects the extending roots from developing friction.

primary succession begins with a bare rock and ends with a forest secondary succession begins after a natural disaster where there is a temporary setback after a forest fire or local destruction, but the surrounding area can fill in