Study the given picture and answer the following question: What do the arrows 1 to 4 indicate?

Arrow 1 - Sunlight Sunlight is necessary for the process of photosynthesis. Chlorophyll absorbs the energy of sunlight and converts it into chemical energy. Arrow 2 - Water Water enters a plant's stem and travels up to its leaves, where photosynthesis takes place. Water combines with carbon dioxide and forms glucose and oxygen in the presence of chlorophyll and sunlight. Arrow 3 - CO 2 Carbon dioxide is one of the most abundant gases in the atmosphere. Carbon dioxide is necessary for the process of photosynthesis. Arrow 4 - O 2 Oxygen comes out as the by-product during the process of photosynthesis.

Study the given picture and answer the following question: Which process is taking place?

The given picture shows the green color leaf and sunlight which is compulsory for the process of photosynthesis. Photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water and carbon dioxide into glucose and oxygen.