Theories are backed up with lots of data, evidence, and observations from many
people over time.
true
false

True

Explanation:

A theory is the detailed explanation for the cause of processes and events that occur naturally.

These are supported by the evidences obtained from experimental trials. The information of the theory can be changed by new evidences obtain by people by applying the principle and methodology of the theory.

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.