Four sentences are given below. Find the odd sentence out.
A. The webs of spiders provide the most vivid examples of animal structures built entirely in tension.
B. Man has long used suspension bridges made of ropes of steel and concrete, which bear loads in tension.
C. Animals and birds are great builders, using simple materials but employing sound engineering principles.
D. Beavers are natural engineers that use tree branches to construct dams, the divided end being pressed into the walls.

Correct option is D

Option (d) sentence B is the odd one out.
✅ Explanation:
Let’s analyze the theme and relevance of each sentence:
· Sentence A: Talks about spider webs as animal structures based on tension → directly about animal engineering.
· Sentence C: Generalizes that animals and birds are great builders, using basic yet principled engineering → directly on theme.
· Sentence D: Talks specifically about beavers using natural materials to build dams, which fits the theme of animal engineering.
· Sentence B: While it mentions tension in structures, it shifts focus to human engineering—specifically suspension bridges using steel and concrete → this deviates from the central theme of animal constructions.
�� Conclusion:
· Sentences A, C, and D are all tied together by the theme: animal-made structures and natural engineering.
· Sentence B breaks this thematic connection by introducing human engineering practices, even though it mentions tension, which makes it the odd one out.