Which age beginning in the 1750s led to an increase of 40% in carbon dioxide levels?

Question 1 of 102 pointswhich best describes adaptive radiation? oa. geographical isolation caused by an adaptationob. biodiversity resulting from few ancestorsoc. a decrease in the rate of speciationd. adaptations that organisms teach each other

I’m stuck on this question cuz i’m stupid sksksksk

Why do we perceive objects as retaining their brightness under different lighting levels?