Which one of the following is the correct sequence of ecosystems in the order of increasing complexity?
Correct Answer: Option A
Ecosystem complexity is determined by the diversity of species, the number of trophic levels, and the intricacy of interactions within the ecosystem.
A pond is the simplest ecosystem with relatively few species and simple food webs.
A lake is more complex than a pond, with greater depth and a wider variety of habitats and species.
A forest is even more complex, featuring diverse plant life, animal life, and intricate relationships between them.
Finally, an ocean is the most complex, with vastness, diverse habitats (coral reefs, deep sea vents, etc.), and highly complex food webs.
Therefore, the correct sequence of increasing complexity is: Pond, Lake, Forest, Ocean.