In this module, you learned how write effective sentences and how to revise sentences for clarity and interest. Practice your revision skills by revising these paragraphs. Use clauses and phrases to combine some of these sentences. Some long sentences may need to be broken up into shorter sentences. Be sure that all sentences are complete ideas. Currently, frog populations around the world are declining. Due to the nature of their life cycles and physiology, frogs are very sensitive to environmental changes. Frogs are born in the water as tadpoles. Frogs move onto land for their adult lives. This makes them vulnerable to changes in aquatic habitat availability. This also makes them vulnerable to changes in terrestrial habitat availability. Their aquatic habitats are drying out. In areas that are becoming more prone to drought.

Frogs are also thermoconformers. This means that they are highly sensitive to changes in global average temperature. Warming temperatures are forcing many species to migrate northward. Warming temperatures are also forcing many species to migrate or to higher elevations. Where the temperature is cooler, restricting the range in which they can survive.

The biggest threat climate change poses to frogs is indirectly linked to climate. When you were young, you may have been told to dress appropriately for the weather so as to not catch a cold because very warm or very cold conditions can compromise your immune system, making you prone to infection and in the same way frogs become more susceptible to infection when they are exposed to changing temperatures like Chytridiomycosis, which is a highly contagious and often lethal disease caused by chytrid fungus, is becoming widespread and threatening frog species around the world.

Efforts are being made to breed sensitive frog species in captivity. It is difficult to ensure that captured frogs are infection-free. There have been efforts to save them. Many local frog populations have been destroyed despite these efforts. Some entire species have become extinct. Due to environmental changes.