Weak muscles lead to Poor posture.
What are signs of muscle weakness?
Symptoms of muscle weakness include difficulty rising from a chair, brushing your hair, lifting an object off a high shelf, or dropping things.
What are the causes of weak muscle?
Muscle weakness is commonly due to lack of exercise, ageing, muscle injury or pregnancy. It can also occur with long-term conditions such as diabetes or heart disease.
Hence, A is correct option
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