The correct answer is option a, that is, sedimentary rock.
There are three main kinds of rock on Earth: igneous, metamorphic, and sedimentary.
The sedimentary rock envelopes about three-quarters of the land on the surface of the Earth. However, sedimentary rock forms only about 5 percent of the top 16 kilometers of the crust of the Earth. The other 95 percent comprises of metamorphic and igneous rocks.
Sedimentary rock is malleable of the three kinds of rock. Thus, it is the quickest to erode.
The answer is apex and base. To simplify, the apex of the heart rests on the diaphragm and from its base, the great vessels emerge. In addition, blood vessels that are nearer to the pumping heart and must enlarge to endure pressure variations are named elastic arteries and foramen ovale permits blood to pass from the right to the left atrium, therefore avoiding to pass the fetal lungs.
Its Light because it reacts to photosynthesis
Nucleic acids are large biochemical molecules formed from nucleotides.
Nucleic acids are polymers. They are made of monomers Nucleotides.