context: There is a strong relationship between the properties of wood and the properties of the particular tree that yielded it. The density of wood varies with species. The density of a wood correlates with its strength (mechanical properties). For example, mahogany is a medium-dense hardwood that is excellent for fine furniture crafting, whereas balsa is light, making it useful for model building. One of the densest woods is black ironwood.
question: ৪. কাঠের কোন বৈশিষ্ট্যগুলো বিভিন্ন প্রজাতি অনুযায়ী বিভিন্ন হয়?
answers: density