original: Description Pack rats are prevalent in the deserts and highlands of western United States and northern Mexico.
simplifications: Pack rats are common in northern Mexico, deserts, and highlands in Western United States. Pack rats mainly live in the deserts and highlands of western United States and northern Mexico. Lots of pack rats are in the deserts and highlands of western US and northern Mexico. Pack rats are plentiful in deserts and highlands. They live in the western part of the US and northern area of Mexico. Description: Pack rats are common in the deserts and highlands of western United States and northern Mexico. Description Pack rats are common in the deserts and highlands of western United States and northern Mexico. Pack rats are prevalent in the deserts and highlands of western United States and northern Mexico. Pack rats can be found in the deserts and highlands of western United States and northern Mexico. Pack rats are common in the deserts and highlands of western United States and northern Mexico. Pack rats are common in the deserts/highlands of western US and northern Mexico.