The characteristic of life that best describes the process of photosynthesis is "using energy."
Here's an explanation to help you understand why:
1. **Photosynthesis**: This is the process by which plants, algae, and some bacteria convert light energy, usually from the sun, into chemical energy stored in glucose. This process involves the use of energy to convert carbon dioxide and water into glucose and oxygen.
2. **Using energy**: Photosynthesis requires energy from sunlight to power the conversion of carbon dioxide and water into glucose and oxygen. This characteristic aligns with the process of photosynthesis as it involves the utilization of energy to carry out the chemical reactions necessary for the production of glucose.
Therefore, "using energy" is the characteristic of life that best describes the process of photosynthesis, as it highlights the fundamental need for energy in this biological process.
