Which of them is most likely to happen randomly picking a vowel letter from the English alphabet randomly picking up croissants from the English alphabet getting a head from a single toss of a fair coin we’re getting a six win rolling a dice once

Getting a vowel letter from the English alphabet is most likely to happen randomly, as there are only 5 vowel letters (a, e, i, o, u) out of the total 26 letters in the alphabet. The other options have equal probabilities of occurring.