Question

which is one piece of evidence of seafloor spreading?
○ fossil material
○ continent material
○ drilled core samples
○ ocean water samples

Explanation:

To determine evidence of seafloor spreading, we analyze each option:

• Fossil material is more related to continental drift or paleontology, not seafloor spreading.
• Continent material doesn't directly relate to seafloor spreading processes.
• Drilled core samples from the ocean floor can show the age and composition of seafloor rocks, which supports seafloor spreading (newer rocks near ridges, older farther).
• Ocean water samples don't provide info on seafloor spreading.

Answer:

C. drilled core samples