What is used for determining direction?
chemical messengers speedometers thermometers barometric pressure trees and flowers magnetic fields lamphreys feedback mechanisms
A B C D E F G H
Compass needles line up with magnetic fields.
Magnetic fields are used for determining direction.
What is used for determining direction? (A) chemical messengers (B) speedometers (C) thermometers (D) barometric pressure (E) trees and flowers (F) magnetic fields (G) lamphreys (H) feedback mechanisms