Question

Which of the following serves as green lungs?

• A. The green pigment of the plants
• B. Forests
• C. Kitchen gardens
• D. Greenhouse gases

Answer 1

The correct option is B

Forests

The correct option is B.

The explanation for correct option:

1. Forests serve as green lungs.
2. Plants and trees give out oxygen and take carbon dioxide, during the process of photosynthesis.
3. They help in the respiration of human beings and maintain the concentration of oxygen and carbon dioxide.

The explanation for incorrect options:

Option A

1. The green pigment of the plants is called chlorophyll.
2. It gives green color to the plant and helps the plant to synthesize its food through photosynthesis.

Option C

1. Kitchen gardens are also known as vegetable gardens.
2. It is a place in which vegetables or herbs, used in the kitchen are cultivated.

Option D

1. Greenhouse gases are the gases responsible for the absorption and emission of infrared radiation from the sun
2. .Some examples of greenhouse gases are carbon dioxide, Methane, CFCs, etc.

Final answer: Forests serve as green lungs.