Which of the following is an example of a necessary chemical reaction in a living organism?
animals have the ability to trap and store energy from water.
plants have the ability to trap and store energy from water.
animals have the ability to trap and store energy from the sun.
plants have the ability to trap and store energy from the sun.

This is what i found on google“ the monomers combine with each other via covalent bonds to form larger molecules known as polymers. in doing so, monomers release water molecules as byproducts. this type of reaction is known as dehydration synthesis, which means “to put together while losing water. in the process, a water molecule is formed.” i hope this you

It should be cryosphere and hydrosphere