What is always in front of you but can’t be seen?

You can see it everyday, But cannot touch it at will. What is it?

I am the first thing you need while camping.
I am always with the person named Marcos Valencia and Carrick.
But Pogba Zlatan and Rooney think I am wasteful and do not need me.
I am the second to the last thing to add when you are making a patch.

What am I?

I look at you, you look at me, I raise my right, you raise your left. What am I?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Let's play a word game. Following are some meaningless words that can be completed by adding random letters on either side of the word.

For example, the word "rdo" can be formed into "pardon".

Using the same technique, can you complete the given words?
ecalc
airb
rinci
tibac
uidel
gorit
igna
eyho

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

What runs around the whole yard without moving?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?