Fill in the Blanks (Reading & Writing)

Bird migration remains one of the most extraordinary feats in the natural world, with some species travelling thousands of kilometres between breeding and wintering grounds. Scientists believe birds —relyrelyingreliedrelies on a combination of the sun's position, the Earth's magnetic field, and familiar landmarks to navigate such vast distances. Climate change, however, has begun to —disruptdisruptiondisrupteddisrupting traditional migration patterns, forcing many species to —adjustadjustingadjustedadjustment their departure times.