Earth is comprised of atmosphere, hydrosphere and lithosphere.
Explanation:
The earth is comprised of three system which is present in solid, liquid and gas they are lithosphere, hydrosphere and atmosphere. Combination of all three sphere is known as biosphere where life exist. Lithosphere is defined as the area of earth which is solid in nature, it is comprised of land part of the earth.
Hydrosphere is defined as the area of earth which is liquid in nature, it is comprised of all the water bodies present in the earth. Atmosphere is defined as the area of earth which is gaseous in nature; it is comprised of air in the earth. The first life originates in the water. The combination of all three is known as biosphere.
The factors that control traits are the alleles. They are determined by two chromosomes which is obtained from the parents. For instance, you are able to roll your tongue, you have two chromosomes one for being able to roll and the other for not being able but since you have that ability you get the allele of being able to roll out your tongue.
In physical cosmology and astronomy, dark energy<span> is an unknown form of </span>energy<span> which is hypothesized to permeate all of space, tending to accelerate the expansion of the universe.
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The answer is A because the heart pumps blood from the heart through pulmonary artery that is low in oxygen and high in carbon dioxide concentration, to the lungs.