It should be A) cell since everything is made of cell in a living body.
Two paths carbon a benefit of using dioxide can take through renewable energy sources the carbon cycle what is
I would say for number three the answer would be 3
The best answer is D.
The mass number of an element is the sum of the number of protons and the number of neutrons. Protons and neutrons both weigh about one atomic mass unit or amu.
The nucleus of an atom is made up of protons and neutrons. Both these two types of particles are almost the same size. Almost all the mass of an atom (99%) is in the nucleus. Atomic mass therefore is really a measure of the size of the nucleus.
I believe the answer is 3.
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