I havent got a clue what the answer is i need the answer help !!!!
delta
Waves of water can change cliffs and fjords. Before you ask, "fjords" is not a misspelling.
Velocity
A line graph shows change over a period of time.
Over a long period of time
because...
speed.
1886 - 2017
The most common graph for change over time would be the line graph.
Hermione's time turner
The tide
Over a long period of time