When the romans defeated the jews and destroyed the second temple, jews fled in an exile called

Diaspora

Explanation:

Its the movement of Jews to other parts of the world and after they destroyed their temples and was followed for several centuries of exile and movements. As the roams sent many Jews to Rome for slavery and went on the until, the recreation of isreal in 1948.  

The enviroment with hedge hogs

Well, a and b together would be negative. b alone would also be negative.