Think of a scenario where human activities affect the biodiversity in an ecosystem. describe the activity and the effect it has on the species in the ecosystem. give at least two specific example.

You have been tasked with sorting the rock samples shown into three categories, with two rocks in each category. what attribute would you use to sort these rocks? which rocks would be in each category? rocks: obsidian, coquina limestone, granite, soapstone,pumice, and gneiss.