The gras are not subject to food...
<span>The most common contaminant to be found in drinking water is microorganisms, nitrate and arsenic. Though water quality and monitoring has come a long way over the past few years, viruses, bacteria and protozoa like giardia lambia can be found in the water and often leads to wide spread illnesses.</span>
They have increased need to carbohydrates, protein, water and iron.
Carbohydrates is the primary source for energy and active people apparently need more energy for their daily activities.
Protein helps build muscles, even though they only need a small amount more of protein than normal people, they still require protein for muscle buildings.
Water has to be needed as they may excrete more sweat by active activities in the day time. Water can also help remove waster material from body.
Iron helps the production of hemoglobin, which is in the red blood cells that help transport oxygen. As they exercise more, they need more oxygen supply for respiration, therefore there is a need for iron supply.
Answer:
hormones
Explanation:
hormones usually cause puberty. Causing the body to grow.
I would guess the plant kingdom, as it produces seeds. The vascular system indicates that they are large plants (trees). Because of the large body, trees has a vascular system so it can transport water and nutritients throughout the body.
