Answer
a.
Work Step by Step
Option b. is incorrect. The endoderm gives rise to the lining of the digestive tract and the respiratory system.
Option c. is incorrect. The mesoderm gives rise to muscles and the organs of the circulatory, excretory, and reproductive systems.
Option d. is incorrect. The periderm forms the outer woody layer of plants.
Option a. is correct. The ectoderm gives rise to the skin, sense organs, and the nerves.
