What common phrase is represented by the below lines

Easy going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Medium going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Tough going:
Weak, 'I can't do it, I'm staying!'
Tough, 'Let's get going.'

Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

Can it be possible to build a house that has all its four walls facing towards the South?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

What word is pronounced the same if you take away four of its five letters?

A pet show was happening in my locality. I went down along with my kids. In that show, I noticed that all except two of the entries were cats. All except two were dogs and all except two were Monkeys.

Can you find out how many of each animals were present in that pet show?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

An evil man kidnapped someone and made them take one of two pills. One was harmless, but the other was poisonous. Whichever pill the victim took, the kidnapper took the other one. The victim took their pill with water and died. The kidnapper survived. How did the kidnapper get the harmless pill?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?