An external conflict is a struggle that pits a character against an outside force, such as another character, or even nature. You can figure this out because external means that the source is outside the affected subject. So in this case the conflict is cause by a source outside the character.
Answer:
a. fossils of farm animals
d. an iron tool for digging
Explanation:
It affected them because the native americans needed the food and stuff but all the animals were eating it and they had nothing to last them
