You have made the hypothesis that the less rainfall on a cactus the more it will grow what should the independent variable in an experiment designed to test the hypothesis

How am i supposed to know your lecture

Your answer is d. silli hope this ! : ) i left an explanation down below if you need it: a sill forms when hot magma squeezes between layers of rock to form a hardened sheet of rock. a sill is basically a tabular sheet intrusion between old layers of sedimentary rock, volcanic beds, or in the direction of foliation inherent in metamorphic rock. the word sill means a concordant intrusive sheet.

According to new research, more than 5..5 million deaths are associated with polluted air. hope this : ).