Ihave no idea how to do this. can anyone answer both 28 and 29 ?

Which statement describes john tuzo wilson’s contribution to the theory of plate tectonics?

What are some characteristics of a free enterprise economy?

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