A) a common ancestor
Homologous structures are structures that are similar in related organisms. There is a basic pattern of bones which can be inherited from a common ancestor
Photosynthesis, the process whereby plants use light from the Sun to convert CO2 into organic compounds such as sugars, and oxygen, is one of the most important natural processes on Earth. This is a sophisticated system with a highly regulated shuttle traffic of ions and molecules that passes through several membranes. I hope I helped you and good luck and I am sorry I know it’s late at night it’s just I love to help people and I ate to much sugar
Speed of light is usually time and space so probably C
