Are the verb tenses in the sentence consistent, or do they shift unnecessarily?

In the autumn, the leaves turn brown, and they fell off of the trees.

A.
The verb tenses are consistent.

B.
The verb tenses shift.

Question

Are the verb tenses in the sentence consistent, or do they shift unnecessarily? 

In the autumn, the leaves turn brown, and they fell off of the trees.
  
 
 

 
 

  

  A. 
  The verb tenses are consistent.   
   

 
 

  

  B. 
  The verb tenses shift.

anonymous · Answer

Looks like a verb tense shift, "the leaves turn brown, and they FELL off of the trees"

It seems like it'd be fall, not sure though

anonymous · Answer

What do you think it is?