How carbon is uniquely suited to Form biological macromolecules give 3 reasons why

Carbon atoms have four electrons of valance. This enables them to form strong covalent bonds with multiple materials. Carbon can also join with it, allowing it to form long chains or atomic rings on carbon.

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i'm pretty sure it's spores

an adaptation is a change or process by which an organism takes to be better suited for its environment. for example; migration is a behavioral adaptation, this is needed because birds are not built to last extremely cold climates. there are different adaptations because there are different species needing to adjust to different things, bears don't migrate; they hibernate.