Question

question 4
2 pts
plants obtain most of the carbon used to build their tissues from which source?
soil minerals
fertilizers
hydrosphere
atmosphere

Explanation:

Plants perform photosynthesis, where they take in carbon dioxide ($CO_2$) from the atmosphere. This carbon from $CO_2$ is used to synthesize organic molecules that form their tissues. Soil minerals, fertilizers, and the hydrosphere are not the primary source of carbon for plant tissue building.

Answer:

atmosphere