Which of the following represents learning as a six-level hierarchy in a cognitive domain? 

Option 1) Bloom's Taxonomy represents learning as a six-level hierarchy in a cognitive domain. 

Important Points

B. S. Bloom has divided the cognitive objectives into six categories (under Bloom's taxonomy) arranged from the lowest to the highest level of functioning.

Stages  Subdomains of Cognitive Domain:

• Knowledge: It refers to the process of recognizing and recalling information.
• Comprehension: It refers to the process of interpreting and assimilating information.
• Application: It refers to utilizing information in new and different situations.
• Analysis: It refers to the process of identifying the pattern and connection among the given information
• Synthesis refers to combining information and making connections among them to generate a new idea.
• Evaluation: It refers to the process of making judgments and Justifying decisions about the value of information and materials
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Thus, Bloom's Taxonomy represents learning as a six-level hierarchy in a cognitive domain.

Key Points

B.S. Bloom has proposed a taxonomy, a set of three hierarchical models that refers to the classification of educational learning objectives.

Bloom's Taxonomy Identified Three Domains of Learning:

1. Cognitive Domain: It involves knowledge and the development of intellectual skills. 
2. Affective Domain: It includes how we deal with things emotionally, such as feelings, values, appreciation, etc.
3. Psychomotor Domain:  It includes physical movement, coordination, and use of the motor-skill areas.