question: ironically, china's wind resource is much stronger in winter, which makes the grid-access problem even more frustrating for the wind industry.
Capitalize this past sentence correctly.
A: Ironically, China's wind resource is much stronger in winter, which makes the grid-access problem even more frustrating for the wind industry.

question: confidence. enthusiasm. strong emotions.
Capitalize this past sentence correctly.
A: Confidence. Enthusiasm. Strong emotions.

question: if you've booked a lowfare+ or flex ticket, the economy menu is included for your flight.
Capitalize this past sentence correctly.
A: If you've booked a LowFare+ or Flex ticket, the Economy menu is included for your flight.