Answer:
D. They wanted to become farmers.
Explanation:
Cyanobacteria use water, carbon dioxide, and sunlight to create their food, and expel oxygen as a by-product. The real significance of stromatolites is that they are the earliest fossil evidence of life on Earth. ... They were the first known organisms to photosynthesis and produce free oxygen.
This question is generally related to the Olmec, Aztec, Incas and Indian tribes in North America.
For such civilizations the greatest geographic challenge was their isolation from the rest of Europe and Asia where modern science was completely changing the world.
Also, these civilizations had abundant farmland, game and food supplies yet North America rarely saw the development of large cities which limited their progress in human development.
Answer: B) Americans should avoid thoughts, beliefs, and actions that are partial
Explanation:
