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A general explanation that has been tested and used successfully across many situations.

Existing scientific theories can help you develop and justify that explanation.

A general scientific explanation that applies to many situations, has been tested and used successfully, and is widely accepted by scientists.

A general explanation that has been tested and used successfully across many situations.

Existing scientific theories can help you develop and justify that explanation.

A general scientific explanation that applies to many situations, has been tested and used successfully, and is widely accepted by scientists.

Scientific theory