Please help I’ll mark you as brainliest if correct

Why should the united state be concerned about air pollution in china?

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

If your blood becomes too concentrated with iona, what will happen to the red blood cells