Plz asap i will give brainliest,

1. which of the following is an example of chemical weathering?

a stream rounds and smoothes rocks into pebbles.

a growing tree root splits a boulder in two.

freezing and thawing rainwater widens a crack in a sidewalk.

acid rain discolors and disfigures a limestone statue.

2.the sun’s energy hits earth’s surface at the most direct angle at which of the following locations?

equator

south pole

north pole

30° n or s latitude