What is friction А a force that slows an object down B a force that speeds an object up ca force that makes an object start moving Da force that can move very heavy objects​

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