Question

which one of the following gases is essential for photosynthesis 1 oxygen to carbon dioxide 3 Argon 4 nitrogen​

Answer 1

Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms' activities. This chemical energy is stored in carbohydrate molecules, such as sugars, which are synthesized from carbon dioxide and water.

So the answer is 2.CARBON DIOXIDE.