H D5 TS Q24 – Selective High School

Due to rising temperatures in tropical areas, many native birds that cannot tolerate the heat are moving to cooler, northern regions. Pelicans, however, can tolerate high temperatures, so their population in tropical areas is not expected to decline.

Which one of the following statements, if true, would weaken the argument above?

Predators of pelicans are declining in tropical regions. Rising temperatures are reducing the availability of key food sources for pelicans. The mating season for Pelicans is in the summer which has been extended due to rising temperatures. A significant proportion of pelicans are already migrating to cooler regions despite tolerating high temperatures.

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Which one of the following statements, if true, would weaken the argument above?