Complex sentence: Rats have been studied for possible use in hazardous situations such as in disaster zones, as they can be trained to respond to commands which may be given remotely, even in brightly lit areas, which rats usually avoid.
Split into simpler sentences: Rats have been studied for possible use in hazardous situations such as in disaster zones. They can be trained to respond to commands, which may be given remotely, and even persuaded to venture into brightly lit areas which rats usually avoid.