Compilation error: 'WDTCR' was not declared in this scope

try to duplicate MOHIT BHOITE project. But I'm having trouble verifying the sketch in Arduino. I get the following error:
compilation error: 'WDTCR' was not declared in this scope.*

** Any help on this matter would be appreciated.

Wrong board selected?

Read the pinned post re 'How to get the most from the forum'

Rookie on board. How I know to select the correct board?

IDE Menu Tools>Board>...

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