What is the main evolutionary advantage a plant gets from growing a bulb like an onion or tulip?
A.
It may become cultivated and grown by humans.
B.
It attracts animals to spread its seeds by eating the bulb.
C.
It does not need to ever use photosynthesis.
D.
It can store food to survive harsh times.

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.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.