Answer the following question: Fact 1: Lakes are generally bigger and deeper than ponds. Fact 2: Some of the best work in ecology has been done on small fresh water pond ecosystems. Given the two facts above, what are generally bigger and deeper than small fresh water ecosystems?

Available choices: i. puddles; ii. wetland; iii. complex; iv. streams; v. lakes; vi. rivers; vii. creeks; viii. fens;
Answer:
v.