To see how nutrients affect plant growth in a pond, Kayla sections the pond into three zones and makes one the control where she doesn’t add extra nutrients. What type of field investigation would this MOST likely be, and why?
(1 point)
Responses
a comparative investigation because it manipulates variables
a comparative investigation because it manipulates variables
an experimental investigation because it manipulates variables
an experimental investigation because it manipulates variables
a comparative investigation because it has different zones
a comparative investigation because it has different zones
an experimental investigation because it has different zones
a comparative investigation because it manipulates variables
This type of investigation involves comparing different zones in order to observe the effects of adding or not adding extra nutrients.