Albert Einstein once said that gravitation " Cannot he held responsible for people falling in love."
A summary is a breif explanation/sum up of what you have talked about or what ever the topic was. It is used to wrap up everything you have explained. It is better to use summary's so that we can say the main idea in less words and so people can read it quicker and get the idea of that topic.
A centrally planned economy oppose these basic economic characteristics- Property owned by private individuals, Market pricing determination by supply and demand forces, encouragement of competition among the companies and providing a wide range of choice to consumer.
This passage uses imagery of sight - it explains everything that the narrator sees: I saw the water, I saw only my round refection, colors and lights need vision to see and then reflecting anything I could see around me.
The last sentence the narrator can only see what's around them and can no longer see anything reflected through the water (since the water shook)