The process during which plants and other organisms take in carbon dioxide is called photosynthesis.

Here's a breakdown:

* Photosynthesis is the process where plants use sunlight, water, and carbon dioxide to create their own food (glucose) and release oxygen as a byproduct.

* Carbon dioxide is absorbed from the atmosphere through tiny pores on the leaves called stomata.

* Inside the plant cells, the carbon dioxide is used in a series of chemical reactions to convert it into glucose.

So, photosynthesis is the key process where plants and other organisms (like algae and some bacteria) play a crucial role in the carbon cycle by removing carbon dioxide from the atmosphere.