Professor binkie has been studying how playing video games affects a student's performance on the sat. using 5,000 students, the professor is monitoring the amount of time they play the video games and how they score on the test. which of these would be a variable that professor binkie would be unable to control during his research? a) total number of students b) numbers of boys and girls c) what date they will take the sat d) how hard the students try on the sat

c is the correct answer hope this !

answer: grassland biomes are closer to the equator and receive more rain.

grasslands are biomes that are dominated by grasses rather shrubs and trees. savanna are biomes that exhibit grasses, shrubs and small tree as vegetation. grasslands are located near the equator of the earth. these are found in north america. savanna biomes are found in africa, south america, australia and india. grassland exhibit moderate climatic conditions, it receives   amount of rainfall higher than savanna.   therefore, savanna exhibit dry and hot climatic conditions.