Answer
a.
Work Step by Step
Option b. is incorrect. The nervous system collects information from the environment and directs activities of the parts of the body.
Option c. is incorrect. The circulatory system distributes blood to all parts of the body to supply the body with nutrients.
Option d. is incorrect. The digestive system processes food for the body.
Option a. is correct. The excretory system collects and releases waste products outside the body.
