Answer:
Support in an argument is supporting your argument. So give reasons for why your argument is correct.
Explanation:
That is all I can answer because there is no link to "zoos connect us to the Natural World"
1d) was designed (long time ago so past tense)
2d) Has been repaired (It is still going on the present, this year)
3c) Had discovered (He discovered America long time ago)
4a) To have worked (worked long ago when he was young)
Hope it helps!
