Answer:
The work of Issac newton is he discovered the gravity.
when he was sitting the the shed of the tree than an apple suddenly fall in his head but he did not realize and again the apple hit the Issac newton head. so there is a saying that there is an apple in Newton head. after that he pick the same apple and thrown into the tree than the apple goes up than again it came down than he think that an object thrown up how it again comes down than later on by many experiment and research he find that it is due to gravity. so this Way he discovered gravity.
The Columbian Exchange also had positive and negative effects. The positive side was the exchange of technology in agriculture, for example, which increased crop yields and food production in favor of Native Americans and in favor of Europeans. One of the negative effects was certainly the appearance of many diseases that Europeans transferred to the American continent. Native Americans first faced such illnesses, were non-resistant to them, and many of them died.
The correct answer according to the options offered is: A.
It makes products cheaper for consumers to buy.
Answer:
d
Explanation:
because the are me said it is the right.
