Will mark brainliest! : ) what evidence has scientists study the origin of water on earth? a. the number of current volcanic eruptions b. the ratio of deuterium to ordinary hydrogen c. the chemical composition of the planetary nebula d. the frequency of asteroid collisions explain your answer! : ) !

B because the older the water the more deuterium it would have

Maybe a horizontal because its a pattern

Humid continental climate is found in the interior of continents between the 30 and 60 degrees latitude, but usually above the 40 degree line.   40 degrees north of the equator means less direct sunlight and therefore less warmth.   this climate is mainly found in the northern hemisphere since there are no major landmasses in the southern hemisphere.  if you live in northern indiana, you know all about humid continental because that is the climate type you have!