What are the factors that produce changes in population size.?

These are the following factors that produce changes in population size:

1) Birth Rate-the number of live births per 1000 in a year.
2) Death Rate-the number of deaths per 1000 in a year.
3) Immigration-the number of people moving into a country.
4) Emigration-the number of people leaving a country.

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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