please give me correct answers and explanation

just give me answers that you can solve

A stream begins at an elevation of 1000 meters and flows a distance of 500 kilometers to the ocean? What is the average gradient? a) 0.5 m/km b) 500 m/km Od 2 m/km d) 0.002 m/km Question 14 (1 point) Saved 4Listen For the figure below, which is the correct way for slope to be expressed? 145 m rise= 20 m 125 m 1.16 m/m 4 m/km 250 m 0.25 km/m 125 m/5 km run - 5 km