B) Primary producers. Autotrophs are organisms that produce their own food through photosynthesis, which are primary producers.
The answer is the second part in the scientific method, C. Forming a hypothesis. This is where the scientist explains IF they do something, THEN, something they believe will happen might occur.
If the cell is round it is an animal/human cell
If the cell is more rectangle shaped it is a plant cell, also if it has a cell wall it is a plant cell.
Hope this helps and just a tip for next time attach a picture if you can(;
A verticle group (up and down) is called a GROUP. The horizontal groups (left to right) are called PERIODS