PLZ HELP ASAP I WILL GIVE BRAINLIEST, thanks!!
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