seismologists have long sought a way to accurately predict earthquakes recently Greek scientist announced that they were able to predict earthquakes based on electrical signals from the graph which statement explains why the investigation was not a controlled experiment

the scientific method.

answer;

c. a tree whose roots are surrounded by wet sand.

explanation;

water stress is an important factor limiting the growth and productivity of forests.water stress is the most often cited cause of poor survival and growth of woody landscape plants.

-insufficient soil moisture is the most common form of water stress, but excess moisture that leads to poor soil aeration (hypoxia) can also result in reduced plant vitality. a tree whose roots are surrounded by wet sand would be least likely to experience water stress.