The phrase "demonstrates the role" is correct and usable in written English.
It is used to describe a situation in which someone performs a particular role in a certain way so that it is clearly apparent to the audience. For example, "The actor's performance in the play demonstrates the role of a grieving father."
Increasing evidence demonstrates the role of MAPK signal in different heavy metal stresses for different plant species [ 45].
This paper demonstrates the role of phenazines for mediating electron transfer.
Detroit's segregation wall demonstrates the role that the federal government played in separating the races throughout the nation.
The given example demonstrates the role of the sensor fault constraint vectors in the design procedure.
Our work clearly demonstrates the role of misfit dislocations in the formation of the ordered array of Ge dots.
This model demonstrates the role of matrix in energy dissipation, and stimulates new advanced material design concepts for ballistic applications.
It demonstrates the role of Engineering Management education in improving international stability and as an effective aid intervention.
The author's study of the Norwegian quota model demonstrates the role that gender diversity can play in corporate governance, while also revealing the challenges diversity mandates pose.
The research also demonstrates the role empathy plays in people's reactions to policy decisions that influence high- and low-ranking members of society.
Application of the solutions to several examples demonstrates the role of kinetically-controlled volatilization and dissolution at both early and advanced stages of the transport process.
The study demonstrates the role of synthesis procedure on the properties of CNT-cement composite and the procedure to numerically evaluate the performance of the composite.
