The correct answer would be the experimental group.
There are mainly two groups present in any experiment; the experimental group and the control group.
The experimental group refers to the group which receives experimental procedures or is exposed to the independent variables to be tested.
In contrast, the control group refers to the group which is kept in controlled conditions, that is, it is not exposed to the variables which are being tested.
Climate change affects patterns of migration. Global warming also influences the routes of many migratory birds and their annual migration rhythm. A lot of migratory birds change their routes, shorten or completely cancel their journey as a result of changing temperatures.
