Which statement accurately describes the relationship between the brain and addiction

a. the brain reacts to excessive dopamine levels by increasing the number of dopamine receptors.

b. all drugs act on dopamine synapses in the same way

c. a higher amount of additive chemical are needed to get the same high when fewer receptors are pesent

d. is wrong

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.