Final answer:
After gaining possession of the Elder Wand, Harry Potter used it to repair his own broken wand, showing his preference for sentimental value over the wand's great power.
Step-by-step explanation:
After Harry gained full possession of the Elder Wand, he used it to repair his own wand. The Elder Wand, being one of the three Deathly Hallows, is a very powerful magical object in the 'Harry Potter' series, capable of performing feats that ordinary wands may not be able to achieve. Instead of using it for malicious purposes or to showcase his power, Harry chose to use the wand to mend his own broken holly and phoenix feather wand, which had been damaged earlier in the story. This action exemplifies Harry's character and values, as he prioritizes the personal sentimental value of his original wand over the immense power of the Elder Wand. His choice reflects his humility and desire not to abuse the power he had unwillingly come to possess.