What question should readers ask to determine the cause in the sentence?
How much does the ball weigh?
Why does the ball press inward?
What does the weight of the ball do?
How does the ball produce force?

  i think you forgot to put the options but if your reffering to this question then your answer will be "b"  a. add "to" to the base form to create an adjective.b. when the subject of a sentence is singular, add "–s" to the base form.c. add "–ed" to irregular base forms to form the past participle.d. do not use a base form with plural subjects