Answer:
c
Explanation:
Gas is our largest issue, therefore that would be the most reliable answer.
The correct option is A.
Puppies normally growl when playing; this type of growling is not aggressive. The growling that are made in such situations indicate the pleasure of the puppies as they are playing together, such growl does not result in biting or any other injuries.
Animal phyla are primarily defined according to B. Patterns of embryologic development and adult body plans.
Definitely decompose dead organisms, otherwise there would be no oil for us.