To measure a one-meter by one-meter section of the tidal pool and the number of mussels, Luke constructs a wooden frame to use in the field. Which of the following BEST describes what he applied to collect his data?
A. a variable to use in the field investigation
B. a map to record data in a particular area
C. a model to represent the ecosystem
D. engineering strategies and practices
D. engineering strategies and practices
Luke used engineering strategies and practices to design and construct a tool (wooden frame) to help him collect data in the field.