Why is a capsule advantageous to a bacterium

What Is a capsule advantageous to a bacterium?

What is capsule?

Why is it advantageous to breathe through the nose than through the mouth?

Why is the choke advantageous to resistors in controlling current in an a.c. circuit?

Why are space crafts usually launched from west to east? Why is it more advantageous to launch rockets in the equatorial plane

Why it is advantageous to paint the outer walls and roof of a house white in hot weather ?

Why a space rocket usually launched from west to east ? Why it is more advantageous to launch rockets in the equatorial plane ?