Algae are autotrophs, which means they derive their food from the sun.
If you are a vegetarian then you do not usually eat meat (animals) but if you are not a vegetarian then you eat meat (animals) some meat that's good to eat is chicken, steak(cow) ham, pork, fish,...
Energy. Like us.
manly teeth and claws
Themselves. They watch and listen for prey with eyes and ears, chase the prey, then kill it.