As explained earlier, a kangaroo word hides a smaller word with a similar meaning inside its own letters, with the hidden word's letters appearing in the same order as in the original word, though not necessarily side by side.
"Respite" fits this pattern. Its letters are R-E-S-P-I-T-E. Taking R first, then E, then S, then jumping ahead to T, spells R-E-S-T in that order. "Rest" is a close synonym of "respite", since respite means a short period of rest or relief from something difficult or demanding. This matches both conditions needed for a kangaroo word.
"Sleep", "Walk", and "Talk" are all short, single-syllable words, and none of them contains a smaller word with a similar meaning spelled out from their own letters in the correct order. Since "respite" clearly hides "rest" inside it with matching meaning and correct letter order, option 2 is the correct answer.