Non-motile asexual spores cut off in chains or clusters at the end of modified hyphae:

Explanation

The correct answer is Conidia. Conidia are a type of non-motile asexual spore that fungi produce at the end of specialized hyphae called conidiophores. They are often formed in chains or clusters, which aligns with the description in the question. Spore is a generic term that doesn't specify the formation process. Bud refers to a different asexual reproduction method involving outgrowth from the parent. Ascospores are sexual spores, not asexual, and are formed inside asci, making them incorrect for this question.