Which statement is true?
a. opinions can be scientifically tested.
b. scientific theories are absolute and cannot be changed.
c. scientists have learned all they’ll ever know about science.
d. facts can be scientifically tested.

D. Facts can be scientifically tested.

Explanation:

Facts are true at all times, or else they are not facts. This means that they will be correct when put against the test, whether in an experiment or through history. If it is not consistent, it is not a fact, but a theory.

~

D is correct, facts can be scientifically tested

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.

i believe your answer would be c.. : )