Answer: Electromagnetic waves
Explanation: The main property of the waves is the way how they propagate or travel in medium The waves which can travel without a medium is said to travel in vacuum or air.
It will be melt in the layer of earth called mantle because mantle has a higher temperature than crust. and as it melt, it will be called magma.
I think it is A but not 100% sure. Think of an enzyme like a key unlock the lock is the protein. And to activate getting inside your car or house you have to fit the key into the lock.
Aerial roots allow the orchid to attach itself to trees.