A pond fills with organic matter during what?

A pond fills with organic matter when "pond ages from oligotrophic to mesotrophic".

Explanation:

The ponds are basically ranging from youngest to oldest in the given categories: Oligotrophic, Mesotrophic, or Eutrophic phases of live. The oligotrophic ponds are known as fresh or young waterbody. Oligotrophic bodies are low in nutrient quantities, like nitrogen and phosphorus, so donot encourage algae and aquatic plants productivity. The middle ages mesotrophic aquatic bodies are carrier of more nutrients and thus more readily the development of plants and algae take place than oligotrophics, but less than eutrophic production. As aging take place from oligotrophic to mesotrophic, the pond sides continue to slope less and the base of the pond starts to fill in with organic matter.

there is no

explanation:

the answer is: reproductively

i think i spelled it wrong lol

anyways hope i

-lavira: )