noun
a noun is a person, place, thing, or idea. In this case, 'intervention' is a noun that refers to the act of intervening or interfering in a situation to alter the outcome.
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The government implemented an intervention to stabilize the economy.
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The teacher's intervention really helped me understand the math problem.
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I appreciate your intervention, it saved me from a lot of trouble.
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Sometimes a little intervention can go a long way in improving a situation.