What happens as a river ages? a. its floodplain shrinks. b. it carries more water. c. it gets faster. d. its stream gradient increases.

It carries more water.

A river is a natural flowing water body. The river usually flows towards an ocean, sea, lake or another river. The river water can combine with rivers and other water body originating from different sources, therefore, as the river ages the sources of water from another water body increases. Hence, river carries more water as it ages.

- measure reactants precisely. ( first choice)

- stir to the reaction take place. ( second choice)

- wait patiently until the reaction completes. ( fourth choice)

- make sure to recover as much copper as possible. ( last choice)