Question

How is chemical weathering best described?

O It is the breakdown of rock by a change in its chemical composition.
O It is the buildup of rock formations over long periods of time.
O It is the breakdown of rock through mechanical disintegration and physical stress.
O It is the buildup of chemical deposits on the surface of rock.​

Answer 1

it is the breakdown of rock by a change in its chemical composition

Step-by-step explanation:

Answer 2

Number 1 because weathering is is breakdown of something over periods of time