<span>D.
a protected area is created to prevent development in a natural habitat.</span>
Answer:
Explanation:
The three main sources of federal tax revenue are individual income taxes, payroll taxes, and corporate income taxes. Other sources of tax revenue include excise taxes, the estate tax, and other taxes and fees. Federal Aid such as Healthcare, Education, Public Transportation are also provided.
Answer:
Half duplex
Explanation:
The half duplex is a device which allows the communication from only one side and the other person can only hear at a time. The example is radio. The person speaks from the one side can only speak and on the other the person can only hear. In a full duplex both parties convey their messages to each other. The example includes cellphones, telephones, wireless phones, etc.
