I think it is Authority hope this helps
Answer:
B) A difference in pressure across a distance.
D. Kidney and bladder are the 2 organs that are part of the excretory system.
Answer: Polar molecules must contain polar bonds due to a difference in electronegativity between the bonded atoms
Explanation :polarity is a separation of electric charge leading to a molecule or its chemical groups having an electric dipole moment, with a negatively charged end and a positively charged end. Polar molecules must contain polar bonds due to a difference in electronegativity between the bonded atoms
