What gives wood its stiffness and strength?

non-woven fabric
cellulose
wadding
lignin
Lignins are particularly important in the formation of cell walls, especially in wood and bark, because they lend rigidity and do not rot easily. Chemically, lignins are cross-linked phenolic polymers. Lignin constitutes 30% of non-fossil organic carbon and 20 to 35% of the dry mass of wood.
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Answers by country

non-woven fabric
cellulose
wadding
lignin
answers
flagEstonia
0%
10%
0%
90%
10
flagAustralia
0%
30%
0%
65%
20
flagRepublic of Ireland
0%
29%
5%
64%
17
flagGreece
7%
30%
7%
53%
13
flagSwitzerland
0%
37%
10%
51%
37
flagIndia
6%
33%
11%
47%
105
flagPakistan
9%
42%
0%
47%
21
flagthe Netherlands
22%
33%
0%
44%
18
flagCanada
17%
21%
17%
43%
23
flagAustria
3%
46%
11%
38%
118
flagItaly
15%
30%
7%
38%
13
flagGermany
5%
46%
10%
36%
390
flagthe United States
3%
50%
10%
35%
109
flagFrance
28%
28%
7%
35%
14
flagPoland
15%
44%
5%
33%
3246
flagthe United Kingdom
14%
48%
10%
24%
82