________is the process of glacial erosion.

The correct answer is: Abrasion and plucking

The correct option is a) Abrasion and plucking.
There are two main processes of glacial erosion:
1.Plucking:

• The first is plucking, defined as the erosion and transport of large rocks. When a glacier crosses land, water beneath the glacier melts and seeps into cracks in the underlying bedrock.
• This water freezes and melts, weakening the bonds that hold rock fragments together.
• The resulting rock can be stripped from its rocky base and easily transported along a moving glacier. Plucking removes rocks and changes the landscape.

2.Abrasion

• Abrasion is defined as the erosion that occurs when particles rub against each other.
• The gigantic volume of a glacier, along with the rock it pulls up and the sediment that attaches to its belly, usually tends to scratch and scrape the rock surface below.