Write a letter to your friend comparing the present society and the society before 20 years.

Dearest friend, as you know, the world we live in was never perfect. So many things are going on like suic ide, pollution, depression, earth problem. I wish I could turn back the clock and live 20 years ago. You may think that that is a weird statement. Well, it's not uncanny. I have a logical explanation why. Twenty years ago, we had the same problems we have now and, that will never change. To live in a community where everyone is loved, where everyone is capable to help others, everyone does not judge people by the way they look but that was the past 20 years ago to be exact we are living in the now where you can't go back all you could do is focus on the future

Explanation:

i would say b. research typically uses a variety of sources

the density would be a smaller number.