Answer: D. cells
Explanation: Green plants and some bacteria and protists obtain energy by absorbing light energy from the Sun to make sugar, a process known as photosynthesis. Animals, fungi, and other bacteria and protists obtain energy by consuming plants or other organisms. Then, once the energy is obtained, the energy is released through a process known as cellular respiration.
These life functions (e.g., waste breakdown and removal, growth and division, transport, respiration) occur in the cells of organisms, and these functions are similar in different organisms.