Describe the pattern of earthquakes and volcanoes on earth

Iam stuck on this question! 45 points : ) how do increases in temperature affect the density of ocean water? answer choices: (a) density does not change (b) density increases (c) density becomes variable (d) density decreases

In the diagram, δgef and δhef are congruent. what is the value of x?

What does the plate tectonic theroy describe?