An Independent variable is a variable that changes or is controlled during an experiment, so according to this information your correct answer will be A) the coconut juice.
Hydrophonic plants are plants that is living in the lands,
and obviously the aquatic plants that are typically used to style aquariums.
However, the bubbles you can perceive in an aquatic plant can perhaps be a source
of oxygen which is recognized as one of the products of plants as well as human respiration. The bubbles
are oxygen and are created from the thylakoid membrane in the chloroplast over photosynthesis.
Plants, Fungi, and <span>Prokaryotes</span>
