In the early 19th century capturing merchant ships as prizes of war was the primary purpose of Privateers navy vessels.
<h3>What is
Privateers navy vessels?</h3>
Privateers are furnished vessels that are possessed, prepared and officered by at least one confidential people, however cruising under a commission, as a rule called letters of marque, from a combative state, which engages the individual or people to whom it is conceded to assault and seize, adrift, vessels or other property of its foe. East Indiaman Kent (left) fighting Confiance, a privateer vessel told by French corsair Robert Surcouf in October 1800, as portrayed in a composition by Ambroise Louis Granera. A privateer is a confidential individual or boat that takes part in oceanic fighting under a commission of war.
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Answer:
This is an controlled experiment because he is only changing the amount of carbon dioxide in the air. Since he is only changing one variable at a time and comparing it to a natural, unaltered tomatoe area, his experiment is controlled.
Explanation:
The definition of a controlled experiment is a test where the person conducting the test only changes one variable at a time in order to isolate the results. An experiment where all subjects involved in the experiment are treated exactly the same except for one deviation is an example of a control experiment.