Answer:
1. If people are lazy and wasting time by gossiping, mere political freedom won’t make any difference for them. So, Tagore says that we should strive tirelessly to achieve perfection in the longer run. To make it easy, we should work hard and not get tired by working. Our aim should be to attain perfection in whatever we do.
2. Tagore envisions the "clear stream of reason" as people caring about what affects them. He wants people to use their voice to take action.
3. Dead habit refers to mindless practicing of obsolete customs and traditions, old beliefs, superstitions and a narrow-minded attitudes. This habit corrodes the mind and renders it useless.
Their, because it is owned by someone
Here we can see some unusual use of syntax, as the sentence doesn't follow the "normal" structure of SVO (subject, verb, object). In this case, the answer is the third option, it follows a verb (danced ... away)-object (the night)-subject (the excited party-goers) format. Thus clearly the remaining options cannot be applied here in this example.
C, contradict, is the answer. It is the only choice dissimilar to the others.
