Respuesta :
One log spanning 40 feet forms a natural bridge.
The phrase spanning 40 feet starts with a present participle spanning, and it is a phrase (given that there is no finite verb), which means that it is a participial phrase.
The phrase spanning 40 feet starts with a present participle spanning, and it is a phrase (given that there is no finite verb), which means that it is a participial phrase.
Forming a natural bridge, one log has a span of 40 feet. (Gradpoint)