Multiple choice

________ is the richest natural source of minerals for plants.

  1. Chemical fertilizers

  2. Soil

  3. Air

  4. Water
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

For plants, soil is the richest natural source of raw materials like nitrogen, phosphorus and other minerals. The absorption of these substances occurs through roots. Chemical fertilisers are synthetic-chemical substances used to enrich soil to promote plant growth. They are not natural sources of minerals for plants. Air is natural but does not contain minerals. Water contains minerals, salts or gases. But it is not the richest source of minerals for plants.

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