Mutualism. e.g. oxpecker and zebra
commensalism. e.g. remora fish and sharks
parasitism. e.g. tapeworms and cow
There are three major structures that are found in plant cells that aren't found in animal cells. These are chloroplasts, (which is where the process photosynthesis takes place), a cell wall (which keeps the structure of the cell), and a large central vacuole, (which stores extra food/water). Don't make the mistake, though. Animal cells have vacuoles, but they are just smaller and not as important, because they have a different way of excreting waste, which plant cells cannot do.
the best answer is d.cytoplasm
Salmon; chia seeds; tofu; walnuts; flax seeds; shellfish; canola oil; navy beans; avocados and brussel sprouts are all excellent sources of omega-3 fatty acids.