People make me, save me, change me, raise me. What am I?

The captain of a ship is telling you an interesting story and then poses a question. He says, “I have travelled the oceans far and wide. One time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. Can you tell me how that was possible?”

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

what does the below rebus mean?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

Identify the hidden meaning behind this picture?

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?