Read the excerpt from "As Debris Piles Up, Americans Are Skeptical Enough Will Be Done to Limit Space Junk.” Open image in full-screen view Private companies such as SpaceX, Blue Origin and Virgin Galactic are becoming increasingly important players in space exploration. Many Americans are confident these companies will be profitable, but they’re more skeptical they will keep space clean of debris, according to a recent Pew Research Center survey . Which phrase from the excerpt is an example of a hyperlink?