After 1081 ,what was the byzantine being weakened by?

Hello,

Question-after 1081 ,what was the byzantine being weakened by?

Answer- The Byzantine Empire held the capital Constantinople which was the center of trade at hat time. So everyone wanted it including the Ottamans. Due to the fast spreading islam the turkish army the Ottamans were able to conqure the capital and this caused the Byzantine Empire to collapse.

the answer is c     : )

explanation:

i don't have an explanation because i don't know, but i think the answer is c because i googled it and google is right : ) just kidding google isn't allways right but the answer is still c. i hope this !

name two ways organisms join a population and two ways organisms leave a population. two ways organisms join a population are birth rate and immigration. two ways they leave are death rate and emigration.

explanation: