Final answer:
The correct tool for collecting ocean water for analysis is the Buchanan water sampler, which is a device used to capture water samples at various depths for scientific study. Option B is correct answer.
Step-by-step explanation:
To collect ocean water for analysis, the type of tool that is used is B. Buchanan water sampler. This device is specifically designed to collect water samples from various depths in the ocean for chemical and biological analysis. The Buchanan water sampler is lowered on a cable and triggered to close at the desired depth, capturing a sample of water without the need for divers.
In contrast, a deep sea trawl, which is marked as option A, is used for sampling marine life by dragging a net through the water, rather than collecting water itself for analysis.
Meanwhile, a carbonic acid analysis apparatus is a laboratory tool for assessing the concentration of carbonic acid in aqueous solutions and is not typically used directly in the ocean for water collection. Hence, options A and C are incorrect with respect to collecting water samples.
The correct answer to the question 'Which type of tool was used to collect ocean water for analysis?' is B. Buchanan water sampler.