What effect does deforestation have on the environment? A increased oxygen in the atmosphere
B increased carbon dioxide in the atmosphere
c decreased oxygen in the geosphere
D decreased carbon dioxide in the atmosphere

its definitely B or C i think that it might be C

Explanation:

As more trees are removed there is less trees to remove the Carbon Dioxide from our atmosphere.

This means that there are less trees producing Oxygen which almost all living organisms need to survive which will decrease the amount of Oxygen in The Geosphere

The Geosphere is any of the almost spherical concentric regions of matter that make up the earth and its atmosphere, as the lithosphere and hydrosphere.

answer: a. a gene that causes a specific trait.