I need the answers I’m confused

What is a small water source like a stream or brook?

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.

Quiero una redaccion de yo soy medico y que tenga 10 lineas