OPT: I. storing water II. deltas III. puddles IV. Loonhaunt V. body water VI. droplets VII. loose soil VIII. bottled water

Fact 1: Lakes are generally bigger and deeper than ponds. Fact 2: Lake Trout Lake Trout fishing is good in Loonhaunt and Pipestone Lakes. Given the two facts above, what is generally bigger and deeper than ponds?
Answer:
IV.