Dan was running, and he tripped and hurt his knee. the pain signals were carried to his brain by the:

a. sympathetic nervous system.
b. central nervous system.
c. endocrine system.
d. lobes of the brain.

Central Nervous System

Explanation:

The emotions such as pain, happiness, trauma and other sensory things are controlled by the brain. The things that we feel like pain, heat, cold et cetera are also controlled by the brain.

The nervous system has two parts peripheral nervous system and the central nervous system. The pain signals are carried from the knees to the brain by the central nervous system.

answer; ///as energy flows through an ecosystem,energy (decreases) at each

the answer is d. chordata