Answer 1
Airlines and cruise lines are able to redeploy planes and ships to other markets whenever demand conditions warrant. Reducing or expanding service in various markets is a common feature within both sectors. Hotels do not have that luxury.
Answer 2
The decade of the 1970s was known as the stagflation period where the economy experienced stagnation in terms of economic growth and inflation. Inflation normally occurs when the economy grows too strongly. With prices for most objects rising, a search for scapegoats was on and regulation was pinpointed as a culprit. The connection was that regulated industries including the airlines had been allowed to pass along cost increases to consumers in the form of higher fares as a means of maintaining profitability. Thus, airlines had no incentive to control costs, especially those involving labor since they knew that they could obtain higher fares to offset such increases. Removing this connection was what deregulation accomplished.
Lyme disease and other infections are caused by the bite of a tick.
Regulation of Ras proteins.
The regulation of muscle contraction by calcium
Mount Pinatubo caused ~1˚C cooling for up to 5 years
Gastric Phase of Digestion: Regulation of Gastric Juice pH and Gastric Motility
Temperature Regulation by the Hypothalamus