The primary role of a functional strategy is to

The primary role of a functional strategy is to support the overall business strategy and competitive approach.

Functional-area strategies concern the actions, approaches, and practices to be employed in managing particular functions or business processes or key activities within a business. For example, the functional strategy for the marketing department in support of the business' goal to increase market share is likely to include identification of new market segments, brand identification programs, and others.

hygrometers and hair thermometers (often found as part of hygrometers/psychrometers) can be used to measure humidity. barometers are used to measure atmospheric pressure, while anemometers are used to measure wind speed. so the 2nd and 4th choices should be the correct answers.