Based on that passage, I'd say the young man is active because he's jogging, and friendly he smiled in encouragement to elderly men. Nothing in the passage indicates that he is either intelligent or snobbish.
The life cycle is natural and moves us forward
I don't know what the example is, but taciturnity means quietness. So the answer is D.
Part A: According to a different source, this video shows how water is an extremely scarce resource in Mexico City. This poses a variety of problems for its citizens.
Part B: Water can have several important uses. It is used for irrigation of crops. It is also used for drinking and for household tasks such as cleaning, washing and cooking.
Part C: Some of the city's residents have become activists in order to deal with the problem of water scarcity. Others buy bottled water to deal with the shortage, while others organize their lives around the availability or the lack of water.
Part D: One of the strategies I would suggest would be fixing the leaks in the water system, which would ensure that all treated water reaches its destination. I would also suggest educating the population on the importance of water and the strategies they can follow to have clean water for longer.
Part E: The main resource that would stop my plans from being implemented would be money. Money can be scarce in Mexico, and this can make it difficult to implement solutions such as fixing a leaking system or starting education campaigns.
