Question

What do red lines in rocks indicate about the biosphere?(1 point)
Responses

Carbon dioxide is being produced by the biosphere.
Carbon dioxide is being produced by the biosphere.

Continental drift affected the biosphere.
Continental drift affected the biosphere.

Oxygen is being produced by the biosphere.
Oxygen is being produced by the biosphere.

Volcanic action has damaged the biosphere

Answer 1

Red lines in rocks often indicate the presence of iron oxides, which can be a sign of oxidation processes that typically occur in environments with significant levels of oxygen. Therefore, the most appropriate response from the options provided is:

**Oxygen is being produced by the biosphere.**