Fact 1: Competition may lead to aggressive behaviors or displays of aggression.

Fact 2: Social aggression is characterized by a dog that demonstrates a deep grumbling bark.

Given the two facts above, answer the question "What can lead to a dog demonstrating a deep grumbling bark?" with the following options: 
- sensory neurons
 - reduced heat
 - competition
 - Decibels
 - friction
 - Damaged hearing
 - matter vibrating
 - adding heat


 

   competition      