A substance A is necessary for the normal growth and development of all types of plants and animals . An acute scarcity of substance A has an I'll effect on plants which can enter natural process B in plants causing a sever shortage of C leading to famine . It may also lead to the shortage of D which is essential for respiration in living organisms
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Hsibus hsusufhbdjdid uusssisisbs isujsis
Siishbjss usisjansvs skksns sjss s susb us us
Siishbjss usisjansvs skksns sjss s susb us us
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