How to enlarge 1:50,000 on map scales

How does the parallax of a nearby object compare to that of an object farther away?

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.

Soil is made of air water organic material minerals weathered rock