To solve this problem, we need to understand the concept of secondary succession and identify the correct scenario where it occurs.$\newline$Secondary succession refers to the ecological succession that occurs in an area where a biological community has already existed but was removed due to a disturbance.$\newline$Let's analyze each option:$\newline \bullet$Option 1: Bare rock - This is typically the starting point for primary succession, not secondary succession.$\newline \bullet$Option 2: Degraded forest - This is a classic example of secondary succession, where the forest has been disturbed but soil and some organisms remain.$\newline \bullet$Option 3: Newly created pond - This would be an example of primary succession, as it starts from a new, lifeless environment.$\newline \bullet$Option 4: Newly cooled lava - This is another example of primary succession, as it begins on a new surface without soil.$\newline$Therefore, the correct option is Option 2: Degraded forest, where secondary succession takes place.