Which sentence contains a gerund?

* my cell phone battery is dying.
* stop worrying about every detail.
* what is Gigi holding the crying baby?
* hiking is a great form of exercise.

When i was young enough to still spend a long time buttoning my shoes in the morning, i'd listen toward the hall: daddy upstairs was shaving, in the bathroom, and mother downstairs was frying the bacon. they would begin whispering back and forth to each other up and down the stairwell. my father would whistle his phrase, my mother would try to whistle, then hum hers backi drew my buttonhook in and out and listened to it -know it was "the merry widow." the difference was, their song almost floated with laughter. how different from the record, which growled from the beginning, as if the victrola were only slowly being wound up. they kept it running between them, up and down the stairs where i was now just about ready to run clattering down and show them my shoes. what is the effect of the parallelism used in the above excerpt? it establishes the rhythm of a duet to echo the song. it expresses the same ideas. it mirrors opposite ideas. it is a paradox.

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.

Excerpt from saving the thrift store: a dramalee washington2rosa: eddie, i don’t recognize the shirt you’re wearing. when did you get it? 3louis: it doesn’t look as disheveled as the soccer shirts you wear all the time.4eddie: well, i’m not going to tiptoe through the soccer field to keep my clothes neat. (louis playfully aims a soccer ball at eddie. rosa deflects it.)5rosa: what i was trying to say is that the shirt looks really good. (louis wanders over to the morning newspaper that is still sitting on the front lawn. he leafs through it while eddie and rosa talk.) in line 5, which point is rosa making when she says eddie’s shirt looks good? a) the store must have new merchandise. b) rosa is jealous of eddie’s new shirt. c) eddie must have done his own laundry. d) eddie often wears old, tattered shirts.