The circulatory system - hemoglobin in the blood transports oxygen :)
Direction and Displacement would be your answer.
Answer:
D
Explanation:
Because every system in the body is vital
Polystyrene is a good insulator as it has small air bubbles trapped inside of it. This means heat energy cannot flow through them therefore it is an effective material for keeping honeybees warm in the winter. Hope this helps :)
