Question

Which underlined word in the sentence is an action verb?  The park was large, and we walked for hours.   A. was   B. walked   C. we   D. large the underlind words are, was large we and walked

Answer 1

B. is the answer to this little nut

Answer 2

Alrighty, so, in order to see if A is the correct answer replace the word "was" with "is." This gives us: 
The park is large, and we walked for hours.
Because this sentence makes sense, "was" is not an action verb.
Answer C.) is not an action verb it is a pronoun
Answer D.) The word "large" is an adjective.
Therefore the right answer is B.) Walked. 
Hope this helped!