The phrase "activity has led to" is correct and usable in written English.
You can use it to indicate that a specific activity has resulted in a particular outcome or consequence.
Example: "The recent community outreach activity has led to increased awareness about environmental issues."
Alternatives: "activity has resulted in" or "activity has caused".
A flurry of activity has led to increased encryption of online communications.
The growing momentum of ISPS research and teaching activity has led to a major expansion in 2006.
In other cases, human activity has led to environmental changes that have caused populations to evolve through natural selection.
Her political activity has led to speculation that she might be angling for a plum patronage position.
All of the activity has led to a sense of community, not competition, says Justin Cox, who co-founded Atlas in 2013.
For years, many Uyghers have sought greater political autonomy from Beijing while some have pushed for outright independence, and that activity has led to harsh crackdowns by Beijing.
In regions where alternating humid and arid climates or human activity have led to erosional stripping of weathered zones, mammoth boulder piles of exhumed core stones exist.
In addition, years of human activity have led to the development of physical and biogeochemical legacies that may have long-lasting impacts on water quality and stream behavior.
There is ample evidence that variations in plot sizes and in commercial activity had led to significant differentiation among comuneros in both of Izalco's indigenous communities.
Ingley (2008) posits that the social and environmental implications of a firm's economic activity have led to a significant increase in the demands placed on companies in relation to the sustainability of their behaviour and the information which they provide.
A government report earlier this year found that the FBI doesn't track how many reports of suspicious activity have led to arrests or have helped ongoing investigations.
