What are the student’s observations and inferences before he starts his investigation?

How will technology impact medicine in the future?

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

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks