Question

Ella looked out her window and saw two birds. She immediately recognized one as a blue jay and the other as a robin. What is her classification based on?
their physical characteristics
their physical characteristics

their genetic makeup
their genetic makeup

their nesting habits
their nesting habits

their preferred diets

Answer 1

Answer:

Physical characteristics.

Explanation:

She knew what type of birds they were based on their physical characteristics.

She didn't see their nests, or see them eat, and she didn't test and analyze their genetics, so a is the correct option.