When using the Python shell and code block, what triggers the interpreter to begin evaluating a block of code

When using the Python shell and code block, the BLANK LINE triggers the interpreter to begin evaluating a block of code.

The Python Shell refers to the interpreter that executes Python programs or commands.A code block can be defined as a lexical structure of a source code that is grouped together.In Phyton, blank lines can be used to distinguish logical sections.In the interactive Phyton Shell, the block will end when entering a blank line.

In conclusion, when using the Python shell and code block, the BLANK LINE triggers the interpreter to begin evaluating a block of code.

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The answer is "A blank line".

Explanation:

The blank line initiates the interpreter to start examining the line of statements whenever the Python shell as well as the code block are used.  

It is also known as the line that has nothing but spaces or lines without texts or a line.  It prints an empty sheet,  which leaves its performance with such a blank line.

-using seeds from the same source

-using the same kind of soil for both groups

-giving the control and experimental groups the same volume of water

-keeping the light the same for the experimental and control groups

-measuring plant height the same way and at the same time for both groups

Explanation:

Using seeds from the same source makes sure that the seeds are of the same species, and using the same soil prevents one group from growing faster or slower because of increased initial nutrition. The same amount of water was also used so that the plants wouldn't die or grow more quickly solely because of water. And, finally, accurate measurements were taken to minimize the chance of incorrect information.