An independent variable is a variable that can stand by itself. It can be predefined or ultimately just stand alone.
The answer is a shift from human and animal energy to energy from other sources.
Answer:
1) Populations are majorly increasing in areas where shifting cultivation is practiced, causing there to be less area available for use of shifting cultivation.
2) Around the world, overall, there is much less unoccupied land that is able to be used for shifting cultivation.
This is AP Human Geography, right?
Answer:
Fresh pineapple prevents gelatin from setting up because it contains a protease called bromelain that digests the links formed between collagen molecules that make the liquid turn into a gel. Canned pineapple doesn't have the same effect because heat from canning inactivates bromelain.
Explanation: