The hole in Martin's stomach was covered by a loose flap of:
ASilk
BSand
CSoot
DSkin
Answer & Solution
Correct answer: D. Skin
1. The hole did not close completely.
2. It was covered with a loose flap of skin, like the washer in a football.
3. Pressing the skin let you peep inside.
_Source: NCERT Class 5 Environmental Studies, 'Looking Around', Ch 3 'From Tasting to Digesting'_
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