Assertion (A): A fish has a streamlined body.
Reason (R): A streamlined body helps fish move faster in water.
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Both Assertion (A) and Reason (R) are correct, and R is the correct explanation of A.
In an Assertion-Reason question, each statement is checked for truth first, and then R is tested as the cause of what A describes.
Assertion — correct. A fish’s body is pointed at the front, broad in the middle and tapering at the tail: a streamlined shape.
Reason — correct. A streamlined shape lets water flow smoothly past the body and reduces the resistance of the water, so the fish can move through it quickly.
The fish has this shape as an adaptation for moving in water, so R explains A.