Please answer this: Answer this question: what is considered to be a disasters?
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Answer: A disaster is a natural or man-made (or technological) hazard resulting in an event of substantial extent causing significant physical damage or destruction, loss of life, or drastic change to the environment .

Please answer this: Answer this question: what president was theodore roosevelt?
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Answer: Roosevelt, Jr. ( ; October 27, 1858January 6, 1919) was the 26th President of the United States (19011909).

Please answer this: Answer this question: what it is a pilot study?
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Answer:
A pilot experiment, also called a pilot study, is a small scale preliminary study conducted in order to evaluate feasibility, time, cost, adverse events, and effect size (statistical variability) in an attempt to predict an appropriate sample size and improve upon the study design prior to performance of a full-scale research project.