Question

Plants are a source of ________.

a. food

b. fuel

c. medicine

d. all of the above

Short answer

The correct option is (d). all of the above

Step-by-step solution

Step 1. Introduction

• Plants are the most essential organisms in an ecosystem.
• They are the primary producers and can produce their own sustenance.
• They are the primary source of energy for all other living beings.
• They are photosynthetic organisms that uses the energy from sun to convert carbon dioxide and water into carbohydrates and oxygen.

Step 2. Reason for Correct option

• Plants are the primary producers and are a source of food for all heterotrophs, organisms that cannot produce their own sustenance.
• Plants are an important source of fuel. They provide firewood for household use and are used to produce biofuel.
• Plants have been recognized for their medicinal value since the ancient times. They contain alkaloids, which are known for their high medicinal value and are used to produce medicines to treat various ailments.