Answer:
A. organ.. B. Species
Explanation:
1. parts that make up organism are called as organs
2. a group of similar organisms that can successfully interbreed called as species.
Rather than helping one species you can help a entire ecosystem. if you think about it, you would be saving more in a ecosystem then you would in just 1 single species
Answer: B. Osmosis Across a Membrane
The movement of water across a gradient is called osmosis.
