Because it's the way of the road.
The Sumerians and other civilization carry out the aspects of creation mandate in the reason that they filled the earth and used the resources God had given them. They use the resources that only God can give them and they also filled the earth.
Answer:
The three topics that are too broad in the list are:
Birds
Astronomy
The Bible
Explanation:
The three topics that are too broad are Birds, Astronomy and The Bible since these three topics have multiple divisions and sections that could be a topic by themselves, besides the other options specify a kind of group such as "Rocky Mountain" Goats, Legends about "Robin Hood", "Solomon's" Temple, Weather "Forecasting" "How" Steel Is Made, Animals "in the Bible", "Egyptian" Pyramids, Kangaroos could be considered broad because it is just a word and it may seem very general but in fact it is already a category in the animal world and finally, Hunting "the Whale"