2. What was the most important benefit that livestock animals gave to Europeans? Why was it so important?

It was important because (for example) horses, pigs, and sheep all came to the New World for various reasons, pigs were used for food, and horses mainly for transportation. Sheep also provided wool to make clothing. These animals made both obtaining food and trading easier and improved people's lives for the better.

radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.