Answer:
Screening Tool.
Explanation:
Denver Developmental Screening Test (DDST) is the type of screening test that is used to examine children aged 0-6 years. The name of this screening test is 'Denver' because of the fact that is was developed in Denver's University, University of Colorado Medical Center. This test is used to examine the developmental progress in the children of 0-6 years of age. The DDST is a screening tool.
In the given case, Freddy is being tested for his developmental progress using the screening test of DDST.
Thus, the correct answer is the screening tool.