He was struggling with a very large conger, and holding fast with one hand to the side of the vessel, in order to seize with the other the gaping jowl of his antagonist, when the master said to him, Take care they don't see you from Belle-Isle.
In Naruto each base-element is stronger and weaker than one element:-. Fire: strong against Wind, weak against Water. Wind: strong against Lightning, weak against Fire. Lightning: strong against Earth, weak against Wind. Earth: strong against Water, weak against Lightning.
When each member of the other team turns out to also be able to make shadow clones, Boruto is quickly outnumbered and his flag is nearly captured. He uses the Kote to perform a combination of water and lightning jutsu to stop them and knock them out, allowing Boruto's team to continue to the finals.