Colour of the plants is green due to the presence of:

Chlorophyll

The correct answer is Option (4) -Chlorophyll

The color of plants is green due to the presence of:Chlorophyll

Chlorophyll is the green pigment found in the chloroplasts of plant cells. It plays a critical role in photosynthesis, the process by which plants convert light energy into chemical energy in the form of glucose. Chlorophyll absorbs light energy from the sun, particularly in the blue and red regions of the electromagnetic spectrum, while reflecting green light, giving plants their characteristic green color. This pigment is essential for capturing light energy and initiating the photosynthetic process, which is vital for the production of oxygen and carbohydrates necessary for plant growth and survival.