I don’t understand. Is there a picture? Where are the options?
Answer:
C
Explanation:
75 mile shallow flat area just off coastlines
Answer:
helium
Explanation:
helium has the highest ionization energy level
Answer:
The second option
Explanation:
Speed is defined at the rate at which distance changes with time. It is scalar quantity and it is expressed as shown below:
Speed = 
At constant speed the rate of change of distance with time is the same. On the second graph, this is noticeable. Both distance and time change at the same rate.