$\text{DDT}$ is related to Abbreviation in the same way as $\text{LASER}$ is related to ______.

$\text{DDT}$ stands for Dichlorodiphenyltrichloroethane and is classified as an abbreviation (specifically an initialism, as it is pronounced letter by letter). On the other hand, $\text{LASER}$ stands for Light Amplification by Stimulated Emission of Radiation and is pronounced aloud as a single structural word. A word formed from the initial letters of a name or phrase and pronounced as a word is defined as an Acronym.