What adds the element carbon to the environment?

Climate change happens because of global warming, which is the result of over accumulated Carbon dioxide in the atmosphere trapping the sun’s rays in the earth. This is due to the careless use and disposal of chemicals containing Carbon such as CFCs in the atmosphere.

solution:

the right option is a

to adding   a new row to a table we   have to do process last table cell and pressing tab.

this is the process to add new row in the cell:

* to add a row below the cell, click insert below in the rows and columns group.

thus this is the required right answer.