They are used for them to adapt to the environment
Answer:
A
Explanation:
Early groups of hunter gatherers continued to move south. They would eventually settle down in areas such as central america, with civilizations such as the Aztecs and the Mayans.
Answer:
The answer is tiny organisms known as cyanobacteria, or blue-green algae. These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and, yes, oxygen.
Explanation:
X axis go up and down y axis go left and right and x axis all ways go first.