The diaphragm is the part that adjusts the light of the specimen
My answer would be c. jelous and mean. hope this helps.
Answer:
Explanation:
Over time, its economic and military might waned and along with it, the empire's capacity to seize an opportunity. Add in civil unrest, natural disasters and powerful enemies such as the Arabs, Seljuk Turks, Bulgars, Normans, Slavs, and Ottoman Turks, and you can see why the Byzantine Empire eventually crumbled.
