What is the result of removing the apical bud?

The most common auxin is

The place where auxins are active is

$A$ substance which accelerates the growth in stem is

By hormone application,it is possible to obtain seedless fruits. In which of the following is it $NOT$ desirable to obtain seedless fruits?

In botanical gardens and tea gardens,gardeners trim the plants regularly so that they remain bushy. Does this practice have any scientific explanation?