The correct answer is option B
The fishes that live in the shallow water along the sea floor needs a flattened shape and eyes on the dorsal side because they need to see above and have least possibility that the eyes will be required to see downwards as they lie at the sea floor.
They have tail for protection and flattened body for easy swimming.
Example: Stingray.
B. Depth creates the overall weight and more something is to be measured
I believe the answer is a and d and b not 100% sure
Biogenesis, the fir tree began life when fertilization occurred to produce a singlee cell.