The highest level of Bloom's taxonomy is , which is defined as using your ability to judge the value of ideas and information you are learning according to internal or external criteria.

Evaluation.

Explanation:

The evaluation stage in Bloom's Taxonomy is where students make a judgment about the importance of concepts, objects, materials and more. Knowledge, comprehension, implementation, examination, synthesis, and evaluation were the main sequence of cognitive skills. Evaluation is the final stage of Bloom's pyramid taxonomy. It is at this stage that students are expected to put together all they have learned to make content assessments. However, it should be noted here that in 2001, synthesis has been removed and creation is added as the highest stage of Bloom's taxonomy.

the answer is:

carbon dioxide

hello

answer: collecting information/data

reason: the student is going around and asking people questions to collect data

i hope this