Answer:
mark me brainlist plzzzzzzzzzzzzzz
Explanation:
Answer: In plastic, particles are very much tightly packed ,so food and drink kept in it do not get spoiled easily and its contact with environment gets cut off. So it is useful in transporting food and drink.
Neils Bohr determined that electrons inhabit distinct energy levels.
heating is repeated to ensure all water molecules have evaporated
of 
, and 
of 