Are the trees afraid of winter? Are they afraid of growing an odd branch, or even losing a few? Are they afraid of being judged by their fellow trees? Are they worried about the squirrels, birds and bugs living within them? Are their leaves green enough? Do they provide enough shade for the tired travellers resting underneath them? Do they provide enough oxygen?
Are they getting enough water, light, warmth? Is their soil proper to sustain them? Are their roots strong and deep clenched? Will their seeds grow into strong trees?
Do they worry about the winds being strong enough to bend them? Do they worry about being cut? Do they worry of disease?