On my work the answer was D ..
Sexual intercourse. The developing of the female egg cells and the production of sperm cells
Plant (producer), grasshopper (herbivore) rodent (omnivore), python/snake (carnivore), eagle (carnivore) mushrooms (decomposer) These lines represent the “Animal food chain” and basically represents how one organism eats another organism while showing what they have to eat to survive which is all one ecosystem
The answer is Sex-Linked Traits
There are so many examples for that in different areas, like biology experiment carried out in our lab recently.
Here's one link:https://www.creative-biogene.com/support/Baculovirus-Efficient-Tool-for-Protein-Expression.html