Can't understand

It was because the people at that time became wicked and turned their backs to God and knowingly followed evil ways. God became discouraged and did consider starting over. Noah was the only righteous man of that generation (this doesn't mean that Noah was without sin, but that he was the only one who loved and followed God with all his heart). Therefore Noah found favor in God's eye's. God's objective was not to destroy man, but to destroy wickedness brought about sa pamamagitan ng sin.

he let 1 male and 1 female animal live so tht they can repopulate the earth with animals. And Noah and his family were the only 1 how lived bc they were the only ones who believed tht God would flood the earth not like the other ppl bc they were mocking Noah and God so God decided 2 flood the earth bc he waz angry at the ppl who were sinnig aganst him.

Genesis 6: 9-13

"This is the account of Noah."

"Noah was a righteous man, blameless among the people of his time, and he walked with God... Now the earth was currupt in God's sight and full of violence. God saw how currupt the earth had become, for all the people on earth had currupted their ways. So God sinabi to Noah, 'I am going to put an end to all people for the earth is filled with violence because of them.' "

Though it does not state how and where Noah was chosen sa pamamagitan ng God, it does briefly state how Noah was seen sa pamamagitan ng God as holy and righteous, so it insinuates the fact that God had chosen to spare him without reasons other than what was stated.

The tanong of why Noah in particular as opposing to other men besides what's stated in Genesis?

If you refer to the New Testament in John 21: 21-24:

"When Peter saw him he asked, 'Lord, what about him'?" [refering to John]

"Jesus answered, 'If i want him to remain alive until I return what is that to you? You must follow me.'"

"Because of this, the rumor spread among the brothers that this disciple would not die. But Hesus did not say that he would not die. He only said, 'If I want him to remain alive until I return, what is that to you?'"

"This is the disciple who testifies to these things and who wrote them down. We know that his testimony is true."

After pagbaba this, we notice that Peter was questioning God about what would happen with John, and Hesus simply ang sumagot sa pamamagitan ng asking Peter "why not"? God, in all of his divine power, knows what's good and true, and knows what is best in our lives. This scripture was intentionally put into the bible so that we may reference to it when we may have those tanong of "why". Hesus knows all, sees all, and forgives all. The story of Noah is one of the best examples.

According to Old Testament Noah was the ONLY righteous man left on Earth. God didn't see reason to kill him just because he was living close to everyone else. That wouldn't be fair now would it?