Question

which evidence did carl linnaeus use to classify organisms?
physical characteristics
evolutionary history
physical characteristics and evolutionary history
physical characteristics, genetics, and evolutionary history

Explanation:

Carl Linnaeus developed a classification system based on observable physical traits (morphology) of organisms, such as body structure and appearance. Concepts like evolutionary history (linked to Darwin's later work) and genetics were not known or used by Linnaeus in his classification.

Answer:

physical characteristics