Used when someone is moving or supporting themselves using both hands and knees.

Physical Action

Often describes someone looking for something low to the ground.

Searching Position

Can indicate a playful situation, like imitating an animal.

Highlights that things, people, or groups are at the same level.

References a balanced competition where no one has a clear advantage.

In this context, 'on all fours' is idiomatic and should not be taken literally.