Question

I need help

Roots of a tree breaking up the side walk
Mecanical OR Chemical

Flood water pounding against a canyon wall and breaking off rock
Mecanical OR Chemical

Acid from plant roots creates cracks in a driveway
Mecanical OR Chemical

Answer 1

one: mechanical, second: chemical and, third: chemical.

Step-by-step explanation:

Answer 2

The first one is mechanical, second is chemical and, the third is chemical.

Step-by-step explanation:

Well acid is a chemical, and water is a chemical compound. The roots are mechanical since it is not a chemical. Mechanical side of things is like you breaking up a sidewalk.