for those who still want fresh vegetable during winter time, the cultivation of spinach in a greenhouse is the right thing to do. spinach tolerates low temperatures.

How would the previous sentence be correctly capitalized?
Answer: For those who still want fresh vegetable during winter time, the cultivation of spinach in a greenhouse is the right thing to do. Spinach tolerates low temperatures.
the 3-star hotel juan miguel, right in the centre of granada, offers comfortable rooms just steps from the famous cathedral, and about a 15-minute walk to the alhambra. the 66 traditionally decorated rooms are suitable for between 2 and 4 guests, and all come with a private bathroom, air conditioning, a tv, mini bar and wi-fi service. interconnecting rooms are also available, ideal if you're travelling with children.

How would the previous sentence be correctly capitalized?
Answer: The 3-star Hotel Juan Miguel, right in the centre of Granada, offers comfortable rooms just steps from the famous cathedral, and about a 15-minute walk to the Alhambra. The 66 traditionally decorated rooms are suitable for between 2 and 4 guests, and all come with a private bathroom, air conditioning, a TV, mini bar and Wi-Fi service. Interconnecting rooms are also available, ideal if you're travelling with children.
some think that wealth and power protect them and they fight to attain these benefits. but sooner or later they come to the realization that happiness cannot be purchased and that the one who seems powerful, confident and great is exactly as powerless as everyone else in life's manifestation of fate.

How would the previous sentence be correctly capitalized?
Answer: Some think that wealth and power protect them and they fight to attain these benefits. But sooner or later they come to the realization that happiness cannot be purchased and that the one who seems powerful, confident and great is exactly as powerless as everyone else in life's manifestation of fate.
they will also use canine units.

How would the previous sentence be correctly capitalized?
Answer: They will also use canine units.