Choose the answer that best completes the sentence below Humans have invented many tools that allow us to access a wider portion of the electromagnetic spectrum ..Humankind has given itself unique powers for collecting information about the world.

A:However
B:as a result
c:since
d:although

and i’ma be givein 20 points each question i ask

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

blue stars have the highest surface temp

stellar distances are usually expressed in light-years

the measure of a star's brightness is called magnitude

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