Answer: The term parent material is weathered rock that becomes soil. The answer is A. 
Explanation: 
There are a total of 7 types of the parent material. The seven types are; outwash deposits, eolian sand, loess, local area overwash, bedrock that has been weathered over time, till, and alluvium. 
This material is made up of living organisms, time, climate, and topography.