Justin notices a particular type of caterpillar feeds only on cottonwood trees in his neighborhood in which way has justin
increased his scientific knowledge
he has made observations about the natural world
he has used technology
he has performed a practical experiment
he has performed an unethical experiment

The observation made by Justin about the caterpillar type feeding specifically over cottonwood tree (natural world) helped Justin to acquire scientific knowledge.

Option A

Explanation:

And it was observed that the specific caterpillar only fed on the cottonwood tree. Therefore, the inference was made based on the observation only and no experimentation was done from Justin.

The given set of method depicts the observational experiment as Justin notices and acquires the set pattern of the specific caterpillar. The object was to notice the specific caterpillar to see what it’s feeding on and whether it is feeding on other or not. So, it indicates the world's nature.

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete

double the distance = divide strength by 4