Answer:
Paleontology seeks to map out how life evolved across geologic time. A substantial hurdle is the difficulty of working out fossil ages. Beds that preserve fossils typically lack the radioactive elements needed for radiometric dating. This technique is our only means of giving rocks greater than about 50 million years old an absolute age, and can be accurate to within 0.5% or better.
Explanation:
The difference between slaves and indentured servants is that slaves were captured and forced to work with no compensation. While indentured servants agreed to have things provided to them in return for them working for a certain amount of time. Pilgrims had nothing to do with these two things. Pilgrims were people who traveled somewhere for a religious purpose.
He applied his skill in engineering to toughen up the defence
