This excerpt is an example of romantic poetry because it?

Te excerpt that is originally attached to the question given is as follows:

"When all at once I saw a crowd,
A host, of golden daffodils;
Beside the lake, beneath the trees,
Fluttering and dancing in the breeze"

The excerpt came from the poem "I Wandered Lonely as a Cloud" and it mainly employs the principles of Romanticism for the main reason that its uses casual language in its lines.