Answer: I’m sorry why do I have to be so S T U P I D :(
Explanation:
The name of that Russian ruler is <span>Ivan IV Vasilyevich or Ivan the Terrible.
The nick name 'terrible' came from his cruel and harsh nature towards all the enemy that he faced.
In the expansion process, he's never had a doubt to killed all the enemies that stand in his way and often use the way of terror to make other kingdom submit.</span>
The Columbian Exchange connected the Eastern and Western Hemispheres by using same things like food, livestock, and crops.
I would say C. the amount of food availablie to the animal, but in the case of say a gold fish (which grows based on the size of its environment) B would be true.