When the veterinarian advised an owner to feed her dog in the morning instead of in the evening, it took several days for the dog to stop salivating late in the afternoon around its previous dinnertime. the gradual decrease in salivation across days is an example of:
a. spontaneous recovery. b. extinctionc. generalizationd. second-order conditioning.

b) extinction.

Explanation:

Extinction is the disappearance of a behavior through lack of reinforcement. Many times, unwanted behavior is rewarded accidentally and most of dog training clients don't even realize what they are doing wrong.For example, imagine that you taught your dog to shake hands. Over time, the trick became less interesting.The dog can be reinforced positively, negatively, through punishment punishment, and through extinction.

B.) nitrogen fixationnitrogen fixation is the process of nitrogen molecules seeping into the soil and inside plant roots and bacteria. it gives more "life" to plants

Droughts cause very arid places such as a desert