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a. A professional tennis player wins a tournament, which then qualifies him for additional tournaments.
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When a. A professional tennis player wins a tournament, which then qualifies him for additional tournaments, this is a "positive feedback loop."
A positive feedback loop refers to a situation where a change leads to a further change that would be incremental in nature.
The professional tennis player won a tournament which led to him qualifying for additional tournaments. The initial change was him winning a tournament and the incremental change was him being able to qualify for even more tournaments.
In conclusion therefore, winning a tournament that led to even more tournaments is a positive feedback loop.
Find out more at https://brainly.com/question/20036785.