A Batch of Brain-Teasers - Groups, Collectives & Containers

A batch is the right term here. 'Tray' might also be possible, assuming that all the scones were cooked at the same time and in the same shaped container.
('Scones' are smallish, fist-sized, fresh sweet or savoury buns. The classic context for them is as part of a 'cream tea', where the scones are split open and eaten with fresh thick cream ~ or just possibly, failing that, butter ~ and jam, accompanied by a fresh pot of tea.)

We speak of a herd of elephants, and also use this when talking about cattle (cows) on a farm: 'a dairy herd' would be one that the farmer kept for producing milk.
A flock (Answer 2) applies to sheep, goats and other similar semi-domestic animals (llamas, for instance), and also ~ perhaps strangely ~ to birds.

One complete 'place' (of knives, forks, plates glasses etc.) is known in the catering trade as a 'cover'; matching plates would usually come in a 'set' (or if very formal, possibly a 'service').

'A wood' consists of several trees, and if you chop down the trees, you will have wood that you could burn or use for making things.

'Stack' is the tidiest word, suggesting that they are all facing the same way up. Any of the other Answers is possible, but they are all more or less untidy; a 'pile' would show some sign of once having been a 'stack', but a 'heap' is more or less shapeless.

A group of architects (or other professionals, such as lawyers, accountants or dentists) is usually known as a 'practice' (not 'practise' with an S, which is the verb meaning 'to rehearse or prepare a skilled performance').
One unit of flats within the same building is 'a block'.

Assuming the vehicles are hoping to enter the car-park one after another, 'a line of traffic' is the most sensible collective term to use here. Otherwise, any of the others would 'roughly do'.

At least a 'bundle' of clothing (or other fabric; or indeed, documents or firewood) looks as though someone has made a slight effort to gather it together. A 'load' could either mean a significant quantity ('a heavy load to carry'), or perhaps enough washing to fill a typical machine, on one occasion.
The term 'bundle' is also used to mean the ~ often quite large ~ mass of documents assembled for reference in a trial in court: photographs, reports, witness statements etc. And we can use this noun (like many others) as a verb: one could 'bundle the children upstairs to the bathroom', as quickly as possible, after coming indoors from a wet or muddy walk.

'Flock' is right both times here. You may not have known, beforehand, that geese (singular: goose) were birds; but from the context, what else could they be ~ except, perhaps, aeroplanes?

For some reason ~ possibly the mental picture of a line one-after-the-other ~ we speak of 'a string of racehorses' and perhaps 'a string of girlfriends'. 'Bevy' is usually applied, alliteratively, to 'beauties', but this seems rather sexist and old-fashioned nowadays. 'Sequence' suggests an element of planning, which one would hope was unlikely in these circumstances unless the man is a real schemer (which would explain why no woman would wish to settle down with him). 'Load' is rather informal and frankly somewhat rude.