What best describes the physical and chemical digestion of food

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

What is the process of pulling apart an n2 molecule nevermind i got it