The correct answer for the question that is being presented above is this one: "oxygen became available from cyanobacteria." About 1.2 billion years ago, eukaryotic and multicelled organisms evolved because oxygen became available from cyanobacteria.
Answer:
I would say B: Calderas.
Explanation:
Calderas are depressions in the earth that have been made after a volcano erupts and then collapses. While Mountains could be an answer but Calderas makes more sence
Weather affects how we dress for the day, our activities, how our food grows, and our health.
Answer:
Physical Maps
Explanation:
Physical maps show the physical outlay of a specific geographic area.
