Justin notices a particular type of caterpillar feeds only on cottonwood trees in his neighborhood.In which way has Justin increased his scientific knowledge?
The answer is He made observations about nature world.
Explanation:
And it was observed that the specific caterpillar fed only on the aspen. Therefore, the conclusion was drawn based on observations alone and no experiments were conducted on Justin's part.
The set of methods given describes the observational experiment when Justin notices and acquires the established pattern of the specific caterpillar. The goal was to notice the specific caterpillar to see what it feeds on and whether or not it feeds on another. Therefore, it indicates the nature of the world.