7. This part of the brain controls memory, and long term abuse of marijuana can permanently damage it.
(5 Points)
Frontal Lobe
Cerebellum
Hippocampus
Amygdala

Hippocampus

Explanation:

The main parts of the brain involved with memory are the amygdala, the hippocampus, the cerebellum, and the prefrontal cortex.

Memory impairment from marijuana use occurs because THC alters how the hippocampus, a brain area responsible for memory formation, processes information.

c is the answer because when something is left after something evaporates that shows the chemical change.