Usually under ground springs, or sometimes hollowed earth beneath solid earth where the water pools.
Answer:
These homologous structure indicates a common ancestry
Explanation:
When 4 organisms show homologous structures, they indicates they belongs to a common ancestor from where the changes takes place in them.
The organs which are structurally dissimilar but functionally same are called as homologous organism.
A. producers
producers=plants=autotrophs
Hope it helps! Comment if you have any questions and have an amazing day!
Eastern range of appalachian mountains