CompTIA A+ describes swollen or warped laptop chassis components as a classic symptom of a failing or swollen lithium-ion battery.
A swollen battery can:
Warp the keyboard
Push the bottom panel outward
Bend or distort the laptop frame
This is a safety hazard and requires immediate replacement.
Why the other answers are incorrect
B. RAM – Cannot cause physical warping.
C. Keyboard – May fail electronically, but does not physically deform itself.
D. HDD – Located away from the keyboard and cannot distort the chassis.
Final Answer: A
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