B. Exosphere
Prefix "exo" means outside, or outer. So, the exosphere is the outer layer of the Earth, which is not a part of the water cycle.
During a phenomenon called beta decay the neutron of the isotope uranium 237 emits/releases an electron causing an increase of atomic number. With the reference of a periodic table the "new" element is Neptunium or Np-237.
Answer is: <span>A. supplies the body with oxygen and nutrients, and picks up carbon dioxide wastes.
</span>The blood<span> transports:
</span>1) oxygen<span> from the </span>lungs<span> to the </span>cells<span> of the body.
</span><span>2) </span>carbon(IV) oxide <span>from metabolism to the lungs, where it is exhaled.
3) </span>nutrients<span>, transports </span>hormones<span> and removes waste products.</span>
B. It has a negative charge and much less mass than a proton.