Approximately how many head of livestock do producers schedule to butcher each year?
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135 million + 2

Explanation:

135 million + depending on the year.

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101