It shows the "rank" of the organism is not a characteristic of the cladistics system. Showing the probable sequence of origins, and showing shared derived characteristics are characteristics of the cladistics system.
I think it’s
C, decreased sources diversity
The aquatic animals in the lake will likely suffer greatly or possibly die from the decrease in temperature because as the temperature plummets, the oxygen molecules will stretch farther apart so there will be less oxygen in the water.
Here is a website that has a lot of info on Galapagos Island and it’s history, etc.
https://www.galapagosislands.com/nature/geography/geology.html
Was für eine Frage ist das?