a negative impact of damming a river is that this can ____ A,)generate electricity B,)divert water for farmland C,)provide recreational opportunities D,)change the conditions for life downstream

• xXxBubblesxXx: I would say the answer would be D.
  
  Because: If a river is dammed then there is little to no flow going downstream. This will effect the life downstream and also change its conditions.
  
  I Hope This Helped!
  
• smithjaydon15:

  Answer:  D

  Because: If a river is dammed then there is little to no flow going downstream. This will effect the life downstream and also change its conditions.