Inyour body what's your systems work together to make sure that oxygen to all the organs of your body? A. Respiratory and Excretory
B. Circulatory and Respiratory
C. Nervous and Excretory
D. Circulatory and Disgestive​

Ithink is a because if say increased in electronegativity

Ithink that the use of creativity in the sciences entails that one produce something out of nothing or from another thing. with this, i think that the he wrote down his results as four parts of the atomic theory is the manifestation of the  creativity of john dalton.