Passage Summary: A day is considered pleasant if it's breezy and not too hot. It's considered oppressive if it's humid and either very hot or totally still.

Reasoning: The passage defines 'pleasant' summer days as having intermittent wind and temperatures under 84°F, while 'oppressive' days require high humidity plus either temperatures over 84°F or a lack of wind.

Analysis: This is a Principle Application question that functions like a logic puzzle. You must strictly apply the definitions provided without making any outside assumptions about weather. For a day to be 'pleasant,' it must satisfy two conditions simultaneously; for 'oppressive,' it must be humid AND meet one of two other criteria. Look for an answer choice that provides a specific weather report where the classification perfectly matches these logical requirements.