Biology examines the structure, function, growth, origin, evolution, and distribution of living things. It classifies and describes organisms, their functions, how species come into existence, and the interactions they have with each other and with the natural environment.
1s orbital
Explanation:
The electron has to go into the first energy level, in the 1s orbital. Helium, with two protons, will have two electrons. These are placed one at a time into the 1s orbital. This makes helium a very contented atom.
B.) the available food on the islands
Since these different beaks were adaptions part of their evolution to be able to be more fit to survive with the food available on the island
Um D? A fold?? If its right mark as brainleist please