Correct Answer: To start a movement

Solution : The most appropriate meaning of the idiom is the third option.

Explanation : To blaze the trail is an idiomatic expression that originates from the act of marking a trail through a forest by making blazes, or distinctive marks, on trees. In a figurative sense, it means to be a pioneer or a leader in a particular field, endeavour, or movement, essentially being the first to explore or establish a path for others to follow.

Therefore, the correct meaning of the idiom would be to start a movement.