What is the main purpose for baobab to have such thick trunk?

water storage
fire resistance
heat resistance
protection against elephants
The swollen trunk of the baobab tree can store as much as 31,700 gallons (120,000 l) of water to endure harsh drought conditions. Indigenous Australians used baobabs as a source of water.
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Very interesting!
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water storage
fire resistance
heat resistance
protection against elephants
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flagNew Zealand
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flagEgypt
90%
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flagKenya
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8%
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flagAustralia
82%
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4%
2%
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flagGreece
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9%
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flagPoland
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6%
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flagGermany
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8%
7%
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flagthe United States
69%
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flagAustria
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13%
7%
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flagCanada
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2%
13%
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flagthe United Kingdom
68%
8%
9%
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flagUnknown
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9%
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flagthe Philippines
68%
10%
5%
15%
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flagGhana
66%
16%
5%
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flagIndia
63%
7%
10%
15%
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flagRepublic of Ireland
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8%
8%
13%
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flagSwitzerland
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14%
11%
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flagSouth Africa
60%
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8%
8%
23
flagPakistan
50%
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22%
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flagNigeria
50%
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11%
33%
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