Respuesta :
Answer:
Answer is the first one
Explanation:
You need a comma after rubber because it is not the end of the sentence and you need to separate it from to. buy is used incorrectly it is suppose to be by.
Answer:
Amazonian Indians invented galoshes centuries ago by dipping their feet into liquid rubber to protect themselves against insects on the ground.
Explanation:
No commas are needed.
We can rephrase the sentence:
Amazonian Indians invented galoshes centuries ago when they dipped their feet into liquid rubber to protect themselves against insects on the ground.
We don't need a comma in this sentence.