Question

cant show everything
why do some representations deliberately
leave out certain parts of reality?
we all know how important water is to the human body.
but in the interactive cell, water was never visible. why do
you think we chose not to make water visible?
water is invisible in nature
this lesson wasnt about water
the cell - and every cell - is
made mostly of water, so if all
the water molecules were
visible, it would be so crowded
with water molecules that you
couldnt see anything else.
because water is blue, it
wouldve made it hard to see
other organelles, such as the
mitochondria, which are also
blue.

Explanation:

The question is about why water was not shown in an interactive cell representation. The first option is incorrect as water is not invisible in nature (e.g., we can see water in a glass). The second option is too simplistic - just because a lesson isn't about water doesn't mean it can't be shown. The fourth option is wrong as water is not blue in this context (pure water is colorless, and the blue in the glass image is likely an artistic choice). The third option makes sense because cells are mostly water. If all water molecules were shown, it would clutter the view of other important cell components (organelles).

Answer:

The third option: "The cell - and every cell - is made mostly of water, so if all the water molecules were visible, it would be so crowded with water molecules that you couldn't see anything else."