Switch because look A switch detects the speed that given device can handle and communicates with it at that speed
Answer: A is Compression and B is Rarefaction.
Explanation:
i think it's right. hope it helps.
The right answer for the question that is being asked and shown above is that: "1-4-3-2." (main sequence-->red giant-->supergiant-->white dwarf). Assume that all four H-R diagrams below represent a star in different stages of its life, after it starts to fuse hydrogen in its core.
