Mood of the speaker in all of these lines is:

The poem is filled with words like 'great', 'wide', 'beautiful', 'wonderful' (repeated multiple times), expressing wonder, admiration, and delight at the world's beauty. The exclamations and the celebratory tone convey a joyous mood. While the speaker also reflects, the dominant mood throughout is one of joy and wonder. Hence option (2), joyous, is correct.