What is a biome and a type of it that we people live in including the types of plants, animals and climate in that biome?

Although the two theories differ on the evolutionary path of dinosaurs, they agree that

As a small change in a person's dna can cause a genetic disorder

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