Final answer:
Swift is used for mobile app development, web development, and server-side programming; software developer work is in the tertiary sector, and urbanization involves the study of urban economics, politics, and environments.
Step-by-step explanation:
The activity for which Swift is used is d. All of the above. Swift is a versatile programming language developed by Apple Inc. It is designed for mobile app development, mainly for iOS and macOS, but it can also be utilized for web development and server-side programming. This makes it a valuable tool for software developers who work in various sectors of technology.
In response to the economy question, a software developer would be categorized in the tertiary sector of an economy, which includes service-oriented jobs. The tertiary sector involves the provision of services rather than the production of goods.
When discussing urbanization, urban economics, urban politics, and urban environments are all included in the sociological study of urbanization. This means the correct answer is d. All of the above.
As for the types of public opinion, majority opinion, elite opinion, and issue publics are examples of public opinion, making the answer d. All of the above once again.