The Earth's orbit around the sun would be the correct answer to that. :) Good Luck
Answer:
Migration
Explanation:
Birds have adapted to the changes in temperature (over generations) and know to migrate when necessary
What did you include in your response?
- For a cell to survive, ion concentrations inside and outside the cell need to be the same.
- If extra ions are not pumped out of the cell, water can enter the cell, causing it to swell and burst.
I would say that C. Is the most correct answer. Hope this helps! :-)