The erosion of land over millions of years by the swift-moving water of a river.
O
tectonic plates causing the uplift of land.
O
wind storms blowing away large chunks of land
over millions of years.
O
the chemical weathering of land from acidic
rainfall.

you can't see the options

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

it's not c. i took the quiz and got it wrong. so my best guess is b.

have a great day, and hope this .

the cost of mining is extremely low compared to the money earned from mining, creating income to improve the environment.