Question

multiple choice question
the ______ is the depth in the ocean at which calcareous skeletal material first begins to dissolve.

○ halocline
○ lysocline
○ thermocline

Explanation:

To solve this, we analyze each option:

• Halocline: A layer in the ocean with a rapid change in salinity, not related to calcareous material dissolution.
• Lysocline: Defined as the depth where calcareous skeletal material starts to dissolve, matching the question's description.
• Thermocline: A layer with rapid temperature change, not related to calcareous dissolution.

Answer:

B. lysocline (Note: Assuming the options are labeled as A: halocline, B: lysocline, C: thermocline. If the original labels differ, adjust accordingly, but based on content, the correct term is lysocline.)