The word "reacts" is correct and usable in written English.
You can use it to describe how a person or thing responds to a stimulus. For example: "The crowd reacted with disbelief when the officials announced the results."
Basic digital personalities can be created through mathematical rules associating the information the device gets from the world with how it reacts to the world.
Francis Egan, Cuadrilla's chief executive, reacts strongly to the suggestion of health risks.
Rudd reacts to Stephen Smith's herogram for Stephen Conroy.
Simon Gardner, a student at Bath Spa University, says: "Hypnotherapy has enabled me to train my brain so that it reacts differently to anxiety-provoking situations.
But much depends on how Erdoğan, still the most formidable figure in Turkish politics, reacts to this reverse.
28 April: Cameron reacts to this by riding around in an open top bus screaming: "You get a free car!
One World Trade Center has lighting that reacts to sunshine, rain harvesting and a state-of-the-art fuel cell installation, one of the largest of its kind in the world.
30 April: Miliband reacts to this by arriving at a scheduled photocall at a Shropshire infant school in a military helicopter, with a tin helmet under his arm.
The Houston area has 38% of the total US oil refining, and its emissions, together with those from vehicles, are a key contributor to the ozone formed when sunlight reacts with nitrogen oxide and volatile organic compounds.
But of course each generation reacts against the previous one, so to us the oldsters are tragically – even cancer-causingly – repressed: terrifying creatures seething with muffled emotions; grim yet cheerful; glinty and beady, all disapproving half-glances, eerie smiles hiding tears, and nothing said.
There is a very different kind of depression however; the shame-rage spiral of the narcissist who reacts to failure with other-directed, humiliated fury.
