What is one way that testing helps scientists determine which solution for a problem works best?

What is the theme of the poem, my tongue is divided into two by quique aviles? my tongue is divided into twoby virtue, coincidence or heavenwords jumping out of my mouthstepping on each otherenjoying being a voice for the messageexpecting conclusionsmy tongue is divided into twointo heavy accent bits of confusioninto miracles and accidentssaying things that hurt the heartdrowning in a language that lives, jumps, translatesmy tongue is divided by natureby our crazy desire to triumph and conquerthis tongue is cut up into equal piecesone wants to curse and sing out loudthe other one simply wants to ask for watermy tongue is divided into twoone side likes to partythe other one takes refuge in prayingtongueenglish of the funny soundstonguefunny sounds in englishtonguesounds funny in englishtonguein funny english soundsmy tongue sometimes acts like twoand it goes crazynot knowing which side should be speakingwhich side translatingmy tongue is divided into twoa border patrol runs through the middlefrisking wordsasking for proper identificationchecking for pronunciationmy tongue is divided into twomy tongue is divided into twoi like my tongueit says what feels righti like my tongueit says what feels rightby quique aviles

Read these lines from denise levertov's poem "in thai binh (peace) province": it is that life, unhurried, sure, persistent, i must bring home when i try to bring the war home. child, river, light. here the future, fabled bird that has migrated way from america, nests, and breeds, and sings, common as any sparrow. which statement best interprets the author's use of metaphor in these lines? a. the metaphor of home suggests that american foreign policy should turn inward. b. the metaphor of the river suggests that life moves ear forward. c. the metaphor of the fabled bird suggests that the war has left americans divided. d. the metaphor of the fabled bird suggests that vietnam will rise to fight again.

In “we wear the mask,” which message is conveyed by dunbar’s repetition of the phrase “we wear the mask”?