All of them
Most, if not all, dinosaurs layed eggs.
All of them lay eggs.
Yes, all dinosaurs do
Yes, dinosaurs all hatched from eggs laid by the females. However, we can not tell if any species were ovoviviparous like some modern reptiles.
Pretty much all dinosaurs lay eggs, so Spinosaurus likely did too.
There are several types of dinosaurs. They can lay from one up to very many (e.g. a fish-type dinosaur). This question needs more detail.
all snakes lay eggs
yes All true dinosaurs were reptiles and laid eggs.
Dinosaurs reproduced just like chickens do.
Saltopus was a reptile and a close relative of dinosaurs. Because all dinosaurs and nearly all reptiles lay eggs, it is safe to say that Saltopus did, too, even though its eggs have never been found.
Almost certainly, since all known dinosaurs reproduced via eggs.
dinosaurs lay eggs in a lonely place to save their eggs from other predators such as under trees etc.