Answer
Public cloud
Explanation
A cloud service is any service that is made available to users who are on demand via internet from the cloud computing service providers. These service providers have servers in their company premises where they offer the services from.
A public cloud is a type of computing in which a service provider makes resources available to the public via the internet. The service provider hosts the cloud infrastructure and delivers computing resources over the Internet Resources vary by provider but may include storage capabilities, applications or virtual machines.
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Energy from sources that can be regenerated or reused is called renewable energy.
Renewable energy is energy that can be replenished on a human timescale like hydro-electric power, solar energy and wind power. Geothermal energy is also considered renewable energy.