Two cries of lines compete with one another for the same prey a n t e l o p e which scenario would cause a decrease in competition a disease kills individuals from the line population see wildfire kills many a n t e l o p e and some lines see an invasion species are competes and replace a n t e l o p e d drive reduce the water available for all species

The scenario that would cause a decrease in competition is when a disease kills individuals from the line population. This would result in a decrease in the number of individuals from one line, reducing their competition for the same prey.