Brainliesttt ! ! : )

what is true of a synthesis reaction?

the products are often pure elements.
the reactants must be in an aqueous solution.
there is only one product.
there must be three or more reactants.

It is not C

I don't think its A

do you have like a lesson or textbook that can help you?

because information like that is going to be in your textbook...

the element that provides strength to the exoskeletons of clams and oysters is phosphorus. this is so because calcium carbonate is the main component in the shells.

explanation:

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.