For example, how did they make sure the animals were fed, watered, bedded etc. and their waste products disposed of?
Genesis 6:1 - 22
MSG - 1 When the human race began to increase, with more and more daughters being born, the sons of God noticed that the daughters of men were beautiful. They looked them over and picked out wives for themselves. 3 Then God said, "I'm not going to breathe life into men and women endlessly. Eventually they're going to die; from now on they can expect a life span of 120 years.
For follow-up discussion and general commentary on the topic. Comments are sorted chronologically.