Stimulants often cause

a. drowsiness
b. lethargy
c. erratic and compulsive behavior
d. increased muscle control

: (

Hi there!

Stimulants excite the central nervous system, rapidly increasing the feel-good chemicals in the brain such as dopamine and disrupting normal communication between cells in the brain. As a result, the user may experience erratic and compulsive behavior such as increased blood pressure. In other words: C.

all soils contain mineral particles, organic matter, water and air the combinations determine the soil's properties – its texture, structure, porosity, chemistry and color. soil is made up of different-sized particles. sand particles tend to be the biggest.