In one study, for instance, bar codes were placed on bees, tracking their activities.
Is this correct? Or do we say...
In one study, for instance, bar codes were placed on bees to track their activities.
In one study, for instance, bar codes were placed on bees, tracking their activities.
Is this correct? Or do we say...
In one study, for instance, bar codes were placed on bees to track their activities.