Volcanic activity has shaped the land in many parts of the southwestern u. s. when lava, ash, or other volcanic materials erupt repeatedly in the same area, a. all the materials flow away from the area. b. the elevation of the area usually increases. c. all the materials become metamorphic rocks. d. the elevation of the area usually decreases.

Which of the following is an example of competition a. the leaves of a tree prevent a small shrub from getting sunlight. three species of birds feed a different heights in the same tree. b. three species of birds feed at different heights in the same tree c. zebra and giraffe’s feed on different grassland plants d. cats living in two different homes eat the same brand of cat food.