\begin{tabular}{l} Echolocation: \\ How Bats Use Sound \\ \( \begin{array}{l}\text { Hots are nocturnal animals that use } \\ \text { echolocation to gather information } \\ \text { about the environment. This process } \\ \text { involves using sound waves that reflect } \\ \text { off objects and return to bats' ears. } \\ \text { Gliding through the dark night, bats } \\ \text { produce high-pitched calls that allow } \\ \text { them to avoid objects and hone in on } \\ \text { small targets. While scientists now have a } \\ \text { wealth of knowledge about echolocation, } \\ \text { this was not always the case. }\end{array} \) \\ \hline Review the paragraph at the top of page 2. \\ Click or tap the sentence that BEST explains \\ why scientists during the eighteenth century \\ were unable to explain how bats used \\ echolocation. \end{tabular}

In the eighteenth century, scientists were grappling with limited technology and understanding of sound waves. They didn’t have the sophisticated tools or theories to study the phenomenon of echolocation, leading to misconceptions about how bats navigated their environment. It wasn't until advancements in acoustics and the study of sound that the mystery began to unfold, allowing researchers to connect the dots and understand the incredible abilities of these winged mammals. Today, echolocation isn't just limited to bats! Some species of dolphins and even certain birds have developed similar techniques to interact with their surroundings. This remarkable ability has inspired scientists and engineers alike, leading to innovations in sonar technology and ultrasonic devices. From navigation systems in submarines to medical imaging, the principles of echolocation are applied to improve our understanding of the world and enhance various technologies!