My hypothesis is “if i increase the frequency then the wavelength will decrease because when frequency increases more wave crest pass which would make the wavelength decrease” how can i evaluate my hypothesis?

just finished the test, the answer is d, greg is the least cost-effective because he charges the most for the project

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.

links? do you have a link? i don't see anything?