What is the source of energy for aquatic communities? how does energy circulate among organisms in an aquatic community?

Aquatic communities, like almost all natural systems, run on sunlight. which means they use solar energy.. Plants and algae capture the sun's energy. Then by the process of photosynthesis, plants and algae use energy from the sun's light to make food and oxygen for themselves out of basic environmental resources likecarbon dioxide, minerals, and water

Ithink option a is correct because you cannot donate a different blood group than yours because it won't match.option a says betsy can donate to mark. they have the same blood group so donation can happen.