<u>Answer:
</u>
Subsistence farming is the level of crop output from a given level of input.
<u>Explanation:</u>
- Farmers grow "food crops" to feed themselves and their families. There will be little or no surplus trade as they get output for whatever input.
- This process is called subsistence agriculture or subsistence farming. They raise the livestock for their own’s use but not for any trade activities.
- For example: nomadic people raise a cow to provide milk to their own family.
- They give sufficient and necessary food for the cow an get the required quantity to suffice their family.
River System........................
C. divides the flow of river systems in the United States into east and west
Explanation:
The continental divide divides the flow of river systems in the United States into east and west. The divide separates water bodies that runs into the Atlantic from those going into the Pacific ocean.
- The divide is the most prominent rocky feature that separates water bodies in the Americas.
- It runs from the Andes down south to the Rocky up North.
- It is a distinct mountain range that typically follows a linear form.
Learn more:
Continental crust brainly.com/question/10537829
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