Explanation:
digestion begins in the mouth Where food is chewed into smaller pieces by the teeth the Tongue helps by moving these pieces around These pieces are covered by saliva Or spit saliva makes the food slippery so It's easier to swallow
Biodiversity simply means the variety of life in an ecosystem, it entails the variability of living organisms from all system with each organism playing an ecological role in the ecosystem. Clear cutting and changes in the environment impact the biodiversity negatively since they cause global worming, destruction of habitat, drought and extreme loss of biodiversity among living organisms.These are lasting negative impacts on the biological diversity of a given ecological system or area.
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