What are four things that cause weathering

Well four things are frost weathering, thermal stress, salt wedging, and Biological Weathering.

Explanation: There are a few more, but you only needed four.

regents of the university of california v. bakke, 438 u.s. 265 (1978), was a landmark decision by the supreme court of the united states. it upheld affirmative action, allowing race to be one of several factors in college admission policy.

you know they are heterozygous for a trait because they have it as jj or jj.