Pluto isn't really close to the sun but from my prior perspective I don't really remember
KCl + H2O
because acid + base gives salt and water
I am not sure but I think it might be A) 6. Sorry if it is not correct because I am not good at chemistry, Hope this helped! :)
The answer is B, the heart is the center of the cardiovascular system as one of its main tasks is to distribute blood throughout the body.