Ans- The tree is finally killed by the uprooting of its roots. When the roots, which had anchored it lying hidden in the earth for years, the trees strength was exposed and this led to the death of the tree. It dried up after it had been uprooted.
Or
The roots are the most sensitive parts hidden in the earth for years. The tree gets air and water through them. When a tree is uprooted, it follows certain steps till it finally dies. It goes, through scorching and choking in the sun and air. Browning, hardening, twisting and withering are the processes that lead to the ultimate death of a tree.