What provides public goods & services to individuals and businesses?

Public goods are economic products that are consumed collectively, like highways, sanitation, schools, national defense, police and fire protection. All members of society should theoretically benefit from the provision of public goods but the reality is that some need them more then others.

The person who answered first is right. Does it have any options?

  b.

there are isolated pockets of farming, generally around rivers and oases, which are used for irrigation.