The phrase "activity demonstrates" is correct and usable in written English.
It can be used when discussing how a particular activity shows or illustrates a specific point, skill, or concept.
Example: "The activity demonstrates the importance of teamwork in achieving common goals."
Alternatives: "activity illustrates" or "activity showcases".
What this activity demonstrates, I am assured, is the vital principles of improvisation.
But the rush of activity demonstrates the extraordinary interconnection among international intelligence services that has surfaced since the Sept. 11 attacks.
Sleebs, B. E. et al. Inhibition of Plasmepsin V activity demonstrates its essential role in protein export, PfEMP1 display, and survival of malaria parasites.
In both experiments, complete loss of activity demonstrates the importance of sequence context in determining whether substitutions are functionally acceptable.
The analysis of height profiles of coefficients of dependence of these processes on solar activity demonstrates the expressed height variability of their values, even change of their sign.
As a whole, our experimental activity demonstrates that classifier systems with genetic algorithms can be practically employed to develop autonomous agents.
All of this activity demonstrated Cosby's ambition, and perhaps also some uncertainty about his place in the comedy world.
Compounds with potent JMJD2A inhibitory activity demonstrated outstanding selectivity for JMJD2A over PHD2.
The report says information known about the plane's final movements and activity, demonstrate there was no attempt by pilots to deliberately ditch the plane in the ocean: "This evidence is... inconsistent with a controlled ditching scenario".
Furthermore, we establish their dependence with the solar activity, demonstrating their shape and location for the last two solar cycles.
Mural thickening correlates with inflammatory activity demonstrated by endoscopy.
