How does tennyson discuss the theme of death in his poems?

 expressing his feelings and coming to terms with his loss.

Explanation:

Just to elaborate a little on the answer, it can be added that the British poet completed this poem in 1849 in honor of his closest friend, whose unexpected death at a very young age devastated him. The poem, therefore, helped him to express his feelings and to come to terms with the loss of his dear friend. There are references to love, nature, and death, but the main motivation for discussing Hallam's death is the expression of his grief.  

that’s the kind of bug henry was; and if we’d a had him along ’stead of our kings, he’d a fooled that town a heap worse than ourn done.”