In Python, indentation determines which statements belong to an if block.
Example:
temperature = 30
if temperature > 25:
print( " It is warm. " )
print( " Drink water. " )
Both print() statements are executed when the condition is true because they share the same indentation level under the if statement.
Python does not use parentheses, semicolons, or square brackets to define the body of an if statement. It uses indentation.
Therefore, the correct answer isB. Lines that share the same indentation level.