"From the dog" is the prepositional phrase since it begins with the preposition "from" followed by the noun phrase "the dog" .
Answer:
I think it is
Natural disasters are a concern for human, life and property, but there is nothing we can do to predict them or prepare for them
During a controlled experiment, a scientist will isolate and test (D) a single variable. A conclusion, nor a mass of information can be isolated or tested. A control group is the group that would receive a placebo, so testing that would be futile.
