The correct option is
C life
The eleventh blank and the line - 'He makes strong fires roar and flourish' are relatable. In the earlier sentence, we read that it instead like a friend will help us to be strong and determined. Hence, according to the poem, we will
flourish forever if the wind becomes our friend. Let's look at the options to find a suitable answer.Option B - 'World' doesn't mean forever. 'We will flourish in world' is not in the context of the poem. Hence, option B is incorrect.
Option C - 'Praise' is grammatically incorrect to use here. 'Praise' means getting a warm approval from someone. The preposition 'in' with 'praise' is grammatically incorrect, as 'in' is used for a place. Hence, option C is incorrect.
Option D - 'Frail' is a negative word which means weak and delicate. According to the poet, if the wind is friends with us we will become stronger and not frail. Hence, option D is incorrect.
Option A - Yes, we will flourish in life if the wind becomes our friend, as it will help us become stronger and more determined. Hence, option A is the correct answer.