Arteries become hard and narrow due to atherosclerosis, which is caused by the deposition of cholesterol and fats on their inner walls. This can lead to heart disease, stroke, and high blood pressure.
Arteries become hard due to the deposition of ----in them.
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Question context
This question is part of 🗣️ Verbal Ability within the broader 🧠 Aptitude Mastery subject and appears in the PPSC Punjab Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.