How do an increase in the organic matter in soil and an increase in soil depth affect the population of plants in an area?
A. Larger plants become the dominant organisms
B. Mosses replace flowering plants
C. Nitrogen-fixing bacteria kill young trees
D. Grasses become diseased.

The steps in the formation of extrusive igneous rocks are listed below in an incorrect order: 1. rock melts due to high temperature. 2. rock is buried deep under earth's surface. 3. magma is forced out of earth's surface during volcanic eruption. 4. lava cools and crystallizes to igneous rock. which of these best shows the correct order of steps in the formation of extrusive igneous rocks? 1, 3, 4, 2 2, 1, 3, 4 3, 4, 2, 1 4, 2, 1, 3