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Refer to the image below — what is the distinguishing feature of this composite reinforcement? 
A{'text': 'Random fiber orientation', 'label': 'A'}
B{'text': 'Fibers running continuously along a specific direction (long-fiber reinforced)', 'label': 'B'}
C{'text': 'Flake-like flat particles', 'label': 'D'}
D{'text': 'Spherical inclusions', 'label': 'C'}
Answer & Solution
Correct answer: B. {'text': 'Fibers running continuously along a specific direction (long-fiber reinforced)', 'label': 'B'}
Continuous/long-fiber composites show fibers spanning the full length of the part, aligned in a chosen direction. Anisotropic — very strong along fiber axis, weaker perpendicular. Used in CFRP airframe spars.
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