its C. geosphere and hydrosphere. bcz hydrosphere(water) includes liquid parts of earth and geospphere includes solid part (sand).
Mutualism because both animals benefit. The Elephant gets relived from the parasites that are on it and the bird gets food.
I believe this is the answer you are looking for:
<span>C. The size and shape of their beaks</span>
Answer:
- It has a vital role. It is the only way out of the optic nerve. By this hole optic nerve exits from the eye and goes towards the brain.
- It can be proved by a simple experiment. A paper sheet is taken. Then a cross and a circle are drawn side by side on that paper. Then we will focus on the cross. Then by closing one eye and by bringing the paper slowly towards our face, the circle will be disappeared at a certain point.
Explanation:
The blind spot is a region on the retina where ganglion cells connect with the optic nerve, and the optic nerve and blood vessels leave the eyeball. There are no receptors in this area so nothing can be translated into vision. That's why the blind spot is unable to see things.
