during an experiment you are required to maintain a separate group of subjects to collect data on so you will be able to make comparisons from your observations. assuming the watered plants grew, what does that mean? they grew at a quicker rate? slower rate? the same rate? compared to what? you need this control group in order to prove your observations either one way or the other such as "compared to unwatered plants, the watered plants grew at *blank* rate."
According to the Arrhenius theory of acids and bases "an Arrhenius acid is a compound that increases the concentration of H+ ions that are present when added to water"
<h3>Answer: <u><em>It's A Hope this helps </em></u></h3><h3>Explanation: </h3><h3><u><em>Well this answer was a bit tricky well A and B were like the same definition and thinking A but C and D were both wrong </em></u></h3><h3><u><em /></u></h3>
