Abandoned farmland that once grew corn is now covered with bushes and small trees. these observed changes resulted directly from
(1)evolutionary change
(2)ecological succession
(3)loss of biodiversity
(4)selective breeding

I believe the correct answer from the choices listed above is option 2. Abandoned farmland that once grew corn is now covered with bushes and small trees. These observed changes resulted directly from ecological succession. It  is the process of change in the species structure of an ecological community over time. 

1. Fungal Meningitis
2. Aspergillus Infection
3. Athletes Foot
4. Ring Worm
5. Histoplasmosis