Different between maize and mango in root system

Maize is a monocot.

It has seed with one cotyledon.

Adventitious root system present.

No cambium present.

While, mango is dicot.

Seed with two cotyledon.

Tap root system.

Cambium present.

Maize has fibrous root system whereas mango has tap root system.

Mango has tap root system which provides good support of the plant and its survival during times of drought. In taproot root system, roots are growing vertically downward. Most dicotyledonous plants have tap root system while on the other hand, maize has a fibrous root system which is the opposite of a taproot system.

In fibrous root system, roots are growing directly from the stem. A fibrous root system is present in monocotyledonous plants and ferns. The fibrous root systems look like a mat made out of roots when the plant has reached maturity.

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i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers