In some cases Yes and in some cases No. It totally depend on a tour, activity, holiday accommodation or a local rental service Provider. Price options are defined by the listing Supplier and not by TripsPoint.
When you have selected a thing to book, click on the 'Travellers' or the 'Price Options' in the box that lists the price and you will see booking options listed. If the only option listed is 'Adults' or a group name and size and no 'Infants', 'Children' or 'Seniors' options then everyone who takes this tour will be charged the same rate.