algae are often restricted to the top 100 meters of the ocean & if an organism is restricted to an area then that organism can only live in that area ->  algae often can only live in the top 100 meters of the ocean  algae often can only live in the top 100 meters of the ocean & sunlight can be found in the top 100 meters of the ocean ->  algae an sunlight often can only be found in the top 100 meters of the ocean  solar energy is a kind of light & sunlight is a kind of light ->  sunlight is a kind of solar energy  sunlight is a kind of solar energy & photosynthesis means producers / green plants convert from carbon dioxide and water and solar energy into carbohydrates and food and oxygen for themselves ->  a plant requires sunlight for photosynthesis  a plant requires sunlight for photosynthesis & algae is a kind of plant ->  algae requires sunlight for photosynthesis  algae an sunlight often can only be found in the top 100 meters of the ocean & algae requires sunlight for photosynthesis -> algae often can only be found in the top 100 meters of the ocean because they require sunlight