The correct answer to this open question is the following.
Although you did not attach options for this question, we can say the following.
The original (first) covenant God made with Abraham was the promise of God to bless the descendants of Abraham. God blessed Abraham and told him that he was going to be the "father" or leader of many tribes. In Genesis, the first book of the Old Testament, God told Abraham to travel to the promised land of Cannan, but he had to make sure that his people would be faithful and loyal to God.
In comparison, the Second Covenant is the one that is referred to in the New Testament, when God, who loves his creatures, sent his own son Jesus to help humans. God promises humans that he will forgive all their sins if they followed Jesus' teachings.
The Paleozoic Era is bracketed by two major events in earth's history. It began with an unexplained explosion in animal life and ended with the world's largest mass-extinction known to man. The causes of these great events are currently unknown and under debate.
