Food safety questions

Average annual precipitation and are the two major features that define the biomes on earth.

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

Other than earth, is also known to have magnetic pole reversal? a: venus b: mars c: earths moon d: the sun