All types of riddles with answers, such as riddles for kids, math riddles, easy riddles, hard riddles, funny riddles, tricky riddles, clever riddles, riddles for adults, fun riddles, tricky riddles and logic riddles.
It is energy and motion, it can fly across the ocean.
It can listen and even speak, it can see and even seek.
It eats neither fruit nor gruel, it eats energy and fuel.
Better say: It doesn't eat; It is transformed into heat.
What is it?