None, the answer would be 2500
Answer:
chloroplasts
Explanation:
photosynthesis takes place inside plant cells in small things called chloroplasts ( mostly found in the mesophyll layer) contain a green substance called chlorophyll
The best answer is D, birds.
For more information and details on the way a bird's respiratory system works:
https://asknature.org/strategy/air-flow-patterns-facilitate-efficient-gas-exchange/
...unless environmental changes occur. These probable environmental changes could influence the supply of food, the condition of shelter and the environment to sustain life and support the population.
