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1. it establishes the foundation for food webs and food chains.

2. preservation of biodiversity prevents the extinction of species

Explanation:

Biodiversity gives a role to every species, whether or not it may seem important. By establishing a food chain, the roles of each organism is fulfilled as an ongoing cycle. If we didn't have this, there could end up being too many animals.

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

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