Which of the Following Helps Shield the Global Population from Exposure

question 20

Multiple Choice

Which of the following helps shield the global population from exposure to essentially all high-energy,bombarding cosmic rays?

• A)Clouds
• B)Fog
• C)Atmosphere and magnetic field of the Earth
• D)Smog

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Definitions:

Echo

A command in various operating systems that displays messages or turns command echoing on or off in programming environments.

Commands

Instructions given by a user or a program to an operating system or software to perform a specific task.

Environment Variable

A variable that describes the environment in which a program runs. It contains a name and a value, where the value is the path to the program identified by the variable name.

Program

A set of instructions that a computer uses to perform a specific task or operation.