Объяснение:
1. What can lead to an unhealthy weight?
ответ: This leads to the development of hypertension, and early, it is often observed in overweight people by the age of thirty. And hypertension is the main risk factor for heart accidents.
2. How does physical activity benefit our muscles and bones?
ответ: Regular physical activity reduces the risk of heart disease (including heart attack, hypertension, and stroke) and helps fight overweight. This fact is widely known. However, significantly fewer people understand that physical activity is also very important in building and maintaining healthy, strong bones.
3. What does our heart do?
ответ: The heart is a muscular organ in humans and animals that pumps blood through blood vessels.
4. What is the difference between low-and medium-intensity classes?
ответ: For low — intensity exercises — 20 minutes or longer with a load of about 50% of the maximum capacity of the heart-fat reserves provide up to 90% of energy. And during aerobic exercise with a heart load of about 75% less fat is burned (about 60%), but the body loses more total calories, including "fat".
5. How does a person feel during high-intensity activity?
ответ: During an aerobic workout, your heart rate should be 70-75% of your maximum and maintained for at least 20 minutes.
Сделала кратко, подробно в источниках.
Write negative sentences with full verb forms. Don't use full stops, they are given.
1. They are not sleeping at the moment.
2. Sally is not choosing a present at the moment.
3. I am not combing my hair now.
Write questions using the present continuous and the verb in the brackets.
1. Are they having breakfast now?
2. Is the cat sleeping in the basket?
3. Are the birds drinking water now?
Put the words into the correct order. Write full sentences with full verb forms. Use punctuation marks in your sentences (full stops and question marks).
1. Paul is not joining us tonight.
2. We are going to a festival now.
3. Are the children playing computer games now?
2 The change in the climate has produced disastrous floods.
3 Many rare species are threatened with extinction.
4 Many of the gases produced by factories are harmful to our health.
5 Exhaust fumes have damaging effects on the environment.
6 Many countries must try and control the growth of the population.
7 Protecting the environment is essential to our survival.
8 The protection of the environment is everyone’s responsibility.
9 While some countries get richer, the poverty in others gets worse.
10 Millions of people in the world are threatened with starvation.