What do you call the predictable changes in the composition or structure of an ecological community?
a. ecological regression
b. ecological succession
c. ecological mining
d. ecological decline

Ecological succession is  used to describe predictable changes in the composition or structure of an ecological community so b

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