Ba-18 what is one of the leading causes of sportsmen's deaths while boating

I believe the answer is: Boating

Water sports ofen being done on an environement where there is strong currents. When accidents occurs on such environment, the body of the sportsmen often brought up by the currents, which make it really hard for the rescue team to do their job before its too late.

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."

answer; dead end or culdesac;