Its the second option....................................... :)
3. Autotrophs produce organic molecules. I think 4 is cellular respiration cannot occur without photosynthesis
Its b during how ever you say that word if not that then c not all the way sure tho
One example:
Energy moves through an ecosystem through different organisms. For example, plants can absorb energy from the sun. Animals, such as grasshoppers, can eat the plants and the energy goes to them. Progressing higher up the food chain, the energy continues to transfer through different animals - grasshoppers can be eaten by mice, mice by snakes, snakes by eagles, etc. etc.