What does a food web link together?

Victuals webs consist of many interconnected pabulum chains and are more authentic representation of consumption relationships in ecosystems. 
The organisms that victual the primary engenderers are called primary consumers. Primary consumers are conventionally herbivores, plant-eaters, though they may be algae eaters or bacteria eaters.
The organisms that victual the primary consumers are called secondary consumers. Secondary consumers are generally meat-eaters—carnivores.The organisms that victual the secondary consumers are called tertiary consumers. These are carnivore-victualing carnivores, like eagles or immensely colossal fish.
Some aliment chains have adscititious levels, such as quaternary consumers—carnivores that victual tertiary consumers. Organisms at the very top of a aliment chain are called apex consumers.

Mars and earth have quite a few things in common. both are  terrestrial planets, both are located within the sun’s  habitable zone, both have  polar ice caps, similarly  tilted axes, and similar  variations in temperature. and according to some of the latest scientific data obtained by rovers and atmospheric probes, it is now known that mars once had a  dense atmosphere  and was covered with  warm, flowing water.