. The quiver tree grows in desert areas in southern Africa. In recent decades average temperatures have been rising in southern Africa. Scientists predict that this warming trend will continue. Quiver trees in the hottest parts of their
range near the equator are dying, but quiver trees at high elevations or in parts of the range that are farther from the
equator are growing and reproducing.
Which of these best explains what is happening to the quiver tree population in southern Africa?