[whatevaxd]

Which 1 will be the best insulator?

Aluminum foil, cotton wool shredded paper or foam.

Put it in order from best to worst would be nice

[whatevaxd]

If possible can you explain why it was so effective?

[Unknown008]

Ok, here it is:

Foam, shredded paper, cotton wool, aluminium foil.

An insulator is one which prevents heat from being transferred.

Foam traps air in the form of bubbles, and air is a good insulator.
Shredded also traps air, but the air can escape, carrying heat away, even if that's really small.
Cotton traps air less than the above materials.
Aluminium foil is a good conductor, and hence, bad insulator.

Hope it helped! :)

PS- Remember that air is the real insulator in each case, and it is used in many ways, in 'thermos', between the walls in cold countries, etc.