Answer:
Recognition.
Step-by-step explanation:
The TARGET model of motivation was developed by Carole Ames. The model is a helpful guide and framework for teachers to help their children build motivation through instructions.
The word TARGET is an acronym for Task, Authority, Recognition, Grouping, Evaluation, and Time.
In the given case, Ms. Castella has used the aspect of Recognition.
According to the aspect of recognition, the teacher can motivate his/her students by helping them to recognise their achievements.
In the given case, Ms. Castella is helping her students to recognise their achievements by comparing their past best work with the recent best work. When students will see improvement and achievement in their works they will feel motivated.
So, the correct answer is recognition.