I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

I add 5 to 9 and get 2. The answer is correct, so what am I?

I am a five-letter word and people eat me. If you remove the first letter I become an energy form. If you remove the first two letters, I am needed to live. Scramble the last three letters and I am a drink. What word am I?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

Take one out and scratch my head, I am now black but once was red. What am I?

I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.

I am first found in caves, now prolific online; I am a depiction, a drawing, a symbol, or sign. I will convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?