Which military advantage was withheld by the south

Historians are concerned with the accuracy of their writings and readings but are also aware of the inability of authors to know every angle of every story biases, perspectives, beliefs, and a variety of other differences history being told by one person at a time no one being totally accurate, as hard as we try really need on this, and you^^

Which of these were achievements of the safavid dynasty? check all that apply.

What was feudalism? (define the structure)