There was no one visible; under him, in the water, the dim shapes of the swimmers had disappeared. then one, and then another of the boys came up on the far side of the barrier of rock, and he understood that they had swum through some gap or hole in it. he plunged down again. he could see nothing through the stinging salt water but the blank rock. when he came up, the boys were all on the diving rock, preparing to attempt the feat again. which sentences below include only prepositional phrases (no participial or absolute phrases and no dependent clauses)? select all that apply.

Ihave no idea what the explanation is.

More than a hundred million e-mails are sent around the world each day, and they are all vulnerable to interception. digital technology has aided communication, but it has also given rise to the possibility of those communications being monitored. according to zimmermann, cryptographers have a duty to encourage the use of encryption and thereby protect the privacy of the individual. —the code book, simon singh what is the purpose of the statistic in this passage? it shows how big the need is for protection. it explains that email is an effective form of communication. it gives new ways to monitor email traffic. it illustrates how popular email has become.

Ineed . in the first paragraph, the word rival means: a. neighbor b. competitor c. customer d. manufacturer