The structure of an atom is best described as:   1.  neutrons in orbit about a nucleus of protons bound to electrons.2. electrons and neutrons in orbit about a nucleus of protons  3. protons and neutrons in orbit about a nucleus of electrons  .4. electrons in orbit about a nucleus of protons and neutrons

Option (4) is the correct answer.

Explanation:

An atom consists of three types of sub-atomic particles which are electrons, protons, and neutrons.

Protons have a positive charge and neutrons have no charge. Whereas electrons have a negative charge.

Protons and neutrons are placed inside the nucleus of an atom. On the other hand, electrons revolve around the nucleus of the atom.

Thus, we can conclude that the structure of an atom is best described as electrons in orbit about a nucleus of protons and neutrons.

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."    

we need additional information in order to determine the cause of death for anna garcia. there are at least 3 things with explanation included as to why we need them are as follows: