The purpose of spindle fiber is to divide the chromosomes in a parental cell to make them into two daughter cells.
<h2>Answer </h2>
Photosynthesis
<u>Explanation </u>
If the carbon dioxide is present in the stomata that means the process of photosynthesis takes place because in this process the carbon dioxide is absorbed by the leaves through the small pores called as stomata present on leaves. For the plant's grow the carbon dioxide and water absorption is essential and during the process of photosynthesis, oxygen is released which essential for the human body. For the photosynthesis the energy is required which is taken from the sunlight.
The force of gravity affects all objects on Earth by pulling them towards the centre. The Earth is close to spherical in shape as this is the geometry gravity prefers. Without gravity, objects would be floating in space. The atmosphere would not exist as the air particles would have no force pulling them towards the planet. Gravity means when you throw something up, most of the time it will come down. It is a force, which causes objects to accelerate when they fall.
I will say that the answer to your his question is letter A
