Yes, He could have made just a few kinds of animals and fish and plants—but I'm glad He didn't, because it makes the world such an interesting place! You could spend your whole life studying just one kind of insect (for example), and yet you'd never discover everything there is to know about it.
And this is one reason, I believe, why God made this world so complex. Everything around us was created by God, and it all tells us what He is like. The psalmist in the Bible put it this way: "The heavens declare the glory of God; the skies proclaim the work of his hands" (Psalm 19:1).
In other words, when we look at the world through the eyes of faith, we realize just how great and wonderful God is—far greater than we can fully understand. The Bible says, "He has made everything beautiful in its time. He has also set eternity in the hearts of men; yet they cannot fathom what God has done from beginning to end" (Ecclesiastes 3:11). God made everything in the universe, and it all tells us how great and wise He is.
But the greatest truth about God is this: You and I can be His friends! God loves us, and He wants to take away our sins and make us part of His family forever. This is why Jesus came into the world, and the most important decision you will ever make is whether or not you will ask Him to come into your heart. Why not invite Him to come into your life today?