Final answer:
The shape moves two steps forward from Frame 1 to Frame 2, three steps forward from Frame 2 to Frame 3, and three steps forward from Frame 3 to Frame 4.
Step-by-step explanation:
Frame 1 to Frame 2:
The shape moves two steps forward from Frame 1 to Frame 2.
Frame 2 to Frame 3:
The shape moves three steps forward from Frame 2 to Frame 3.
Frame 3 to Frame 4:
The shape moves three steps forward from Frame 3 to Frame 4.