What is a role of an environmental inspector

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.

Less developed nations have low literacy rates. true or false

Which two nations are doing the most to combat their environmental issues?