If Earth's orbit was to somehow move closer to the Sun, what would be true about its orbital velocity around the Sun?

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