This question tests the understanding of fixed collocations in English. **Core Concept:** Fixed collocations are groups of words that are commonly used together, where the combination sounds natural to native English speakers. These combinations are often not interchangeable. **Correct Answer (B):** 'Make a decision' is a fixed collocation, where 'make' is used with 'decision.' While other verbs might sound acceptable, 'make' is the most common and natural. **Incorrect Option Analysis:** * **A:** 'A tall tree' is a typical adjective + noun combination but not a fixed collocation. Many adjectives can be used before 'tree.' * **C:** 'Quickly walk' is an adverb + verb combination, not a fixed collocation. There is no required verb to walk. * **D:** 'Very good' is an adverb + adjective combination but not fixed, as other adverbs can be used, and the same adverb can be used with other adjectives. **Key Points:** Fixed collocations are word combinations that frequently appear together and should be learned as a whole unit. **Error Prone Areas:** Students often mix up general word combinations with fixed collocations. Fixed collocations are less interchangeable and sound more natural when used correctly.