would you say it like this?
2.1. “La Arrendadora” se obliga a prestar a “La Arrendataria” y esta acepta, sus servicios profesionales en el área de marketing, research de mercados, consultoria comerciales, para el asesoramiento de los clientes de “La Arrendataria”.--------------------------------------------------
2.1 "The lessor" binds itself to provide the "leaseholder" and this one accepts, its professional services in the area of marketing, market research, commercial consultancy, for the assesment of "the leasholder's" customers.