What is the function of dna polymerase?

question 3 options:

adding base pairs

correcting errors

both adding base pairs and correcting errors

neither adding base pairs nor correcting errors

plz ! : (

will give to the 1st one who me : )

plz i am stuck
: (

What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures