Which of the following is an example of an informal assessment tool a- ages and stages questionnaire b-gold assessment program c-environmental rating scale d- anecdotal records

The correct option is D.
Informal assessment refers to those tools that are used to measure a student's personal performance and progress while formal assessment refers to systematic and pre-planned data-based tests which measured how much a student have learned. An example of this is SAT exam.
Anecdotal records refers to a note that is used to given an insight into a specific behavior and a basis for planning a specific teaching method. This type of record deal with facts.