Step 1: The correct word means the rate of change of velocity, Acceleration.
Step 2: Its spelling has double c and single l: A-c-c-e-l-e-r-a-t-i-o-n.
Step 3: Option 1, Aceleration, has only single c and single l, missing the double letter.
Step 4: Option 2, Aceeleration, wrongly doubles the e instead of the c.
Step 5: Option 3, Accelaration, wrongly changes the second e to a.
Step 6: Option 4, Acceleration, correctly has double c and the right vowel pattern.
Answer: option 4, Acceleration.