Give the correct term for each of the following
1.2 meeting point of two river
1.3 entire area drained by a river and its tributaries
1.4 area where the river begins its flow
1.5 ridges separating river within the drainage basin
1.6 small rivers joining a larger river
1.7 area from which water flows into a dam
1.8 a river and the smaller river that join it.
1.2 confluence
1.3 watershed or river basin
1.4 source or headwaters
1.5 divide or watershed divide
1.6 tributaries
1.7 catchment area
1.8 main river and its tributaries