Of course it has, many third world countries require modern technology to grow and flourish. Before the industrial revolution in the United States, many people worked extremely hard to make clothes and create armory but after the revolution, the impact was huge sewing machines came into work, interchangeable parts and etc. we now use technology that we have to help countries that are still developing.
The correct answer is participant observation
Participant observation is an excellent methodological resource for field research, makes it possible to obtain a holistic and natural perspective.
Answer: Because scientist found that the water was polluted.
Explanation:
What is meant by a constitution
SUPREME LAW OF ANY COUNTRY