Final answer:
The technology that enables customization of questions in internet surveys based on previous answers is JavaScript, a scripting language used for adding interactive features in web browsers.
Step-by-step explanation:
The technology that allows variables, such as answers from previous questions, to be inserted into unfolding questions on internet surveys is JavaScript.
JavaScript is a scripting language commonly used to create interactive effects within web browsers. When it comes to online surveys, JavaScript can be used to dynamically change the content, such as questions and answers based on the user's input. This provides a more tailored and responsive experience for the respondent.
For example, if a user selects a particular answer to question 1, JavaScript can immediately present question 2 tailored to that answer. This kind of interactivity makes the surveys more engaging and helps to ensure that the collected data is more relevant and precise.