The author believes that ……………

There's a lot I've learnt about flowers. They're just like people. If you put too many together in one vase, they get on each other's nerves and start to fade. If you mix some kinds together, you get what appears to be a form of class distinction. And, of course, the water is so important. Do you know that some people think it's kind to change the water every day? Dreadful! You can hear the flowers dying if you do that. I change the water once a week, and put a handful of earth in it, and they survive.