The answers are …
1) Courts. All of the others are anagrams of each other.
2) The nail would be at the same height since trees grow at their tops.
3) Day 19, it’s not 10 because on day 20 she doubled from day 19, so 19 must be half the size of the pond.
4) Eat and Ate
5) She’s 12.
6) An iceberg
7) I am the pupil of an eye.