Question: Will plucking occur if a glacier is NOT advancing? Need Assignment Help? No, because glacial ice is still moving inside the glacier even if the glacier's front is not advancing. Yes, because snow accumulation and snow melting are equal when a glacier's front is not advancing. No, because snow accumulation and snow melting are equal when a glacier's front is not advancing. Yes, because glacial ice is still moving inside the glacier even if the glacier's front is not advancing.