The person whose ground they land on.
dead leaves fallen under trees form a layer of DUFF which protects the ground from moisture evaporation
This is best carried out when the leaves have fallen. With Evergreens do it in the early Spring.
Ladybirds sleep underneath fallen leaves and gaps in trees.
If the season is Autumn or Fall then the effect is much raking of leaves.
Trees can be deciduous or evergreen. Evergreen trees have leaves all the year round. Deciduous trees have leaves which die and fall off in autumn, then regrow in spring. You can find out if a tree is deciduous by waiting for autumn/winter, and seeing if its leaves have died and fallen off.
Fallen leaves and holly leaves are not considered "mates" in a biological sense, as they belong to different categories. Fallen leaves refer to leaves that have detached from trees or plants, while holly leaves specifically refer to the leaves of holly plants, which are evergreen and often have a distinctive shape and spiny edges. In an ecological context, fallen leaves contribute to soil health and provide habitat, whereas holly leaves serve as part of the plant's photosynthesis process. Thus, while they coexist in nature, they do not have a direct relationship as mates.
fallen leaves decay and make the soil rich with organic matter
early spring when its not too hot and make sure it is irrigated
When dormant .After the leaves have fallen.
Trees primarily produce oxygen through photosynthesis, which occurs in their leaves. When leaves fall off in autumn, the tree's ability to photosynthesize is significantly reduced, leading to minimal oxygen production. However, trees can still engage in some respiration and metabolic processes, but they do not actively produce oxygen without their leaves. Therefore, during the leafless season, trees do not contribute much to oxygen levels.
To prevent leaves from dropping in your garden, you can regularly rake and remove fallen leaves, prune trees and shrubs to reduce leaf litter, and consider using a leaf blower or mulching mower to manage leaves more effectively.
I'm British and neither I nor anyone I know does anything with apple trees at Christmas. The apples have been eaten and its leaves have fallen long before Christmas.