Final answer:
The detail from the text that best supports the idea of clinging to life is: d) All the same, there was something timid and weak about its efforts now, and the boss decided that this time should be the last.
Step-by-step explanation:
The detail from the text that best supports the idea of clinging to life is: d) All the same, there was something timid and weak about its efforts now, and the boss decided that this time should be the last. This detail shows that even though the tree is clinging to its last leaves, its efforts are timid and weak, suggesting that it is nearing the end of its life.
Similarly, people may cling to their last pleasures even when they know it is time to let go.