The shape of a sign warns you of what is ahead

by cartels in other countries, shipped by air, mail, or land. i cant really see your answer choices : /

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.

1. they vary with a higher number because boiling is way hotter than melting

that tool would be a compass