What is the main piece of evidence supporting the theory of seafloor spreading? Fossils of plants and animals along the ocean floor

Volcanic activity along the Ring of Fire

Glacial scratches on the seafloor

Alternating magnetic pattern in the rocks of the ocean floor

thanks hahahaha sorry jdfjcjjdfj

Alternating magnetic pattern in the rocks of the ocean floor

Explanation:

The rocky sea floor on either side of mid-ocean ridges has a matching pattern of magnetic stripes. This information provides evidence for sea-floor spreading. The matching striped pattern shows that Earth’s polarity was recorded on either side of the ridge as lava oozed from the ridge and cooled.  

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.