Answer:
The answer to the first question should be b.
Explanation:
Throughout your body, minerals help build bones and provide structural support. In your mouth, calcium helps harden your enamel and strengthen your jawbone. Hope this helps!
Answer: Nitrogen is so vital because it is a major component of chlorophyll, the compound by which plants use sunlight energy to produce sugars from water and carbon dioxide (i.e., photosynthesis). It is also a major component of amino acids, the building blocks of proteins.
Explanation:
Air pressure is the amount of pressure exerted by the air in a particular air mass. Humidity is a measure of the water content of the air mass. Clouds are tiny drops of water or ice that form in the atmosphere. Wind is a process of movement of air that occurs due to the uneven heating of the Earth's surface.
Pulmonary alveolus is the answer.
