11. how did george westinghouse contribute to railroad transportation? (1 point)

his invention of air brakes made railroad travel safer and faster.
his development of the sleeping car made railroad travel much more comfortable. his invention of the steam engine made railroad travel faster and more affordable. his creation of a railroad network make railroad travel more efficient.

The quiver tree grows in southern africa. which of the following plant adaptations is likely to prevent these trees from dying out due to rising desert temperatures? releasing a black powder onto their trunk to absorb more heat from sunlight shifting their growing range towards the equator ability to store water in leafy structures to prevent excess evaporation limiting seed dispersal to nearby locations