Something that is passed from one living thing to another in the food chain

Something that is passed from one living being to another in the Food Chain is the flow of energy, when one organism is consumed by another: a Biomass Priamide is created, where the matter and energy of each organism, from the primary consumers (plants and their solar energy) to the tertiary consumers (the carnivorous), they all absorb the energy of the other living beings that they consume; this is called Energy Flow and the Biomass is considered the fuel of living beings.

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Answer mauritania is in the northwestern part of african, meaning its in the western hemisphere, and how do i know/ the map showed me so; ///: )