Which is the result of a seasonal change? A. Forests shrinking due to fire
B. A kitten growing up to be a cat
O C. Grass dying from pollution
D. Birds migrating south

My answer to the question is "birds migrating south".

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thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.