Explanation

According to Bloom's Taxonomy, the lowest level of learning in the cognitive domain is "knowledge"

Bloom's Taxonomy:

This classification system categorizes learning objectives into three domains:

cognitive (mental skills),

affective (emotions and attitudes),

psychomotor (physical skills). 

Cognitive Domain Levels:

Within the cognitive domain, the levels progress from

"knowledge" (lowest) to "comprehension," "application," "analysis," "synthesis," and "evaluation" (highest).