Please help me I can’t fail please fast

Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d.a round-trip ride to school and back

What form of anesthetic was used for field surgery

What are the three groups of atoms that make up amino acids called