I'm not 100% sure, but I'd say the availability of vaccines and medicine.
If we didn't have sun's energy there wouldn't be life on earth.Sunlight is what plants eat. Animals and bugs eat the plants that have sunlight in them. Humans and other animals then eat the bugs and the animals that ate the plants. Indirectly every living thing has sunlight feeding it.
Hope this helps!
The speed of sound wave is slower than electromagnetic wave.
A tomato is a fruit. It has seeds so it isn't considered a vegetable it is a fruit.