"What is the cause"

1. Eccl. 7: 10
     10 Say not thou, What is the cause that the former days were better than these? for thou dost not enquire wisely concerning this.
2. Acts 10: 21
     21 Then Peter went down to the men which were sent unto him from Cornelius; and said, Behold, I am he whom ye seek: what is the cause wherefore ye are come?
3. Alma 5: 10
     10 And now I ask of you on what conditions are they saved? Yea, what grounds had they to hope for salvation? What is the cause of their being loosed from the bands of death, yea, and also the chains of hell?
4. D&C 101: 52
     52 Now, behold, the nobleman, the lord of the vineyard, called upon his servants, and said unto them, Why! what is the cause of this great evil?