The documentary on coral reef ecosystems proved instructive, revealing the complex symbiotic relationships that sustain these underwater communities.
这部关于珊瑚礁生态系统的纪录片很有教育意义，揭示了维持这些水下群落生存的复杂共生关系。
Which choice best defines “instructive”?
D — Providing useful information or knowledge. “instructive” means providing useful information or knowledge.
Which word means “providing useful information or knowledge”?
C — instructive. “instructive” means providing useful information or knowledge.
instructive — providing useful information or knowledge. In Chinese: 有教育意义的，有启发性的.
instructive is pronounced /ɪnˈstrʌktɪv/.
The documentary on coral reef ecosystems proved instructive, revealing the complex symbiotic relationships that sustain these underwater communities. (这部关于珊瑚礁生态系统的纪录片很有教育意义，揭示了维持这些水下群落生存的复杂共生关系。)
educational, informative, illuminating — all close in meaning to instructive (providing useful information or knowledge).
uninformative, misleading — each the opposite of instructive (providing useful information or knowledge).
Yes. instructive is on the SAT Prep Basic list — the everyday academic words the SAT assumes you already have. The Digital SAT does not test vocabulary in isolation; words like this one are tested through Words in Context questions, where you choose the word that completes a passage most logically and precisely.