In what ways does this poem show the heroism of the Yellow River?

1. The author praised the heroic spirit of the Yellow River from three aspects, namely, the Yellow River nurtured the Chinese nation, the Yellow River defended the Chinese nation, and the Yellow River will inspire the Chinese nation to forge ahead courageously. "ah! Yellow River! " A sentence appears three times in the poem, which divides the main body of the poem into three levels and praises the Yellow River from three aspects. We can think from the following aspects: the natural features and geographical features of the Yellow River, its contribution to the Chinese nation in history, the Yellow River becoming a fortress of national spirit and so on. ) 2. The author praises our nation by praising the Yellow River, arousing the national pride and self-confidence of the vast number of Chinese sons and daughters, inspiring them to be "great and strong" like the Yellow River, and defending the Yellow River and the motherland with heroism and strong determination.