The correct answer is C. it takes up space and has mass.
This is something which is true of all matter. A is incorrect because it can be made of other things as well. B is incorrect because it can be found elsewhere as well. D is incorrect because it can take any form it wants - not just liquid or gas.
Answer:
Nitrogen
Explanation:
Nitrogen is an important nutrient required for the proper growth and development of plants. Farmers usually plow and grow under alfalfa - a leguminous crop, to enhance the fertility of soil. This is because alfalfa adds more amount of Nitrogen in the soil than any other crop. Studies suggest that around 50 lbs. of nitrogen per acre can be added in soil each year by growing alfalfa in the crop fields. This has immense potential to overcome the problems that crops face due to lack of fertilizers.
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The only infectious diseases that have been completely eradicated so far are smallpox and rinderpest. Public education about any disease is an important step. You also need to develop a vaccine. A worldwide vaccination program was created in the case of smallpox. Anyone who showed symptoms was quickly quarantined and given a vaccination.
