Summarization
Directions: The paragraph is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph. Spell out the missing letters of the word.

     Bats emit a very high frequency sound and listen for the echo that bounces off objects. The difference in time between emitting the sound and hearing the echo allows the bat to build up a mental "picture" of its environment. Homing pigeons can fly back to their home lofts by using the Earth's magnetic field to navigate. 

The animals with s powers.