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%
8%
0%
91%
12
flagAustralia
0%
30%
0%
65%
20
flagRepublic of Ireland
0%
33%
5%
61%
18
flagGreece
7%
30%
7%
53%
13
flagSwitzerland
0%
37%
12%
50%
40
flagIndia
6%
33%
11%
47%
105
flagPakistan
9%
42%
0%
47%
21
flagCanada
17%
21%
17%
43%
23
flagthe Netherlands
20%
35%
5%
40%
20
flagthe United States
3%
46%
10%
39%
120
flagAustria
3%
46%
12%
38%
121
flagItaly
15%
30%
7%
38%
13
flagGermany
6%
45%
11%
36%
420
flagPoland
15%
44%
5%
33%
3353
flagFrance
26%
33%
6%
33%
15
flagthe United Kingdom
13%
46%
10%
27%
86