The correct answer is B. Respiration.
Respiration is the process by which organisms convert food into energy. This process takes place in the cells of the body and involves the breakdown of glucose, a type of sugar, into carbon dioxide and water. The energy released during respiration is used to power the cell’s activities.
Photosynthesis is the process by which plants use sunlight to convert carbon dioxide and water into glucose and oxygen. This process takes place in the leaves of plants and is essential for life on Earth.
Reproduction is the process by which organisms produce offspring. This process can take place sexually or asexually. Sexual reproduction involves the fusion of two gametes, or sex cells, to produce a new organism. Asexual reproduction does not involve the fusion of gametes and can occur in a variety of ways, such as budding, fragmentation, or parthenogenesis.
Excretion is the process by which organisms remove waste products from the body. This process takes place in the kidneys and involves the filtration of blood to remove waste products such as urea, creatinine, and uric acid. The waste products are then excreted in the urine.