Aflying airplane is affected by which force or forces a.) friction only b.) gravity only c.) gravity and friction only d.) gravity, friction and an applied force

Smog is the term used to describe the combination of fog and smoke

Can someone me with 3 and 4 plz. this is for masteries test.

1) describe the physical layout of the ocean floor ? 2) explain how the dumbo octopus swims differently than other octopus species and why this would be an advantage in the aphonic zone . 3) why are the types of organisms that live at each underwater hot vent so dramatically different ?