Causal group

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Bacterial ooze

Bored holes

Bored holes

Bushy appearance

Chewed portion

Chewed portion

Color change

Color change

Color change

Color change

Cracking

Exudation of liquid

Galls

Galls

Bacterial ooze

Bored holes

Bored holes

Chewed portion

Chewed portion

Chewed portion

Color change

Color change

Color change

Cracking

Cracking

Exudation of liquid

Galls

Bored holes

Bored holes

Bushy appearance

Chewed portion

Chewed portion

Color change

Color change

Color change

Color change

Cracking

Exudation of liquid

Galls

Galls