Choose the correct option.
1) The phrase rough and tumble means ​

We live in a wonderful world.But human activity kills our planet.Millions of animals die every year. Man has polluted  their natural homes. People cut down trees,build more roads. The seas and rivers are polluted with chemical waste.That's why our rivers are empty of fish. There is a lot of litter on the seashores. Pollution is very dangerous not only for people but for wildlife too.It's strange but we live among litter, breathe the fumes of cars, cigarettes. People pollute themselves  with alcohol and and junk food.People don't pay attention to scientists' predictions. The humanity is in danger.If we want to save ourselves we should protect the nature and be much more serious.

So, let me introduce myself. My name is Pavel, my surname is Demidoff. I’m 19 years old man. As you might have already understood, I’m a student.
I have been studying at Saint-Petersburg State Medical University named after I.Pavlov since 2013, and I’m going to be a highly qualified specialist in surgery as my dad. People say that I’m very respectful, sociable, flexible and caring. I hope that all these characteristics can help me to become a good doctor. I’m absolutely sure, that when I complete my degree, I might get the opportunity to start a stable and fantastic career in the main hospital of our city.