def add_strawberry(original_list):
    list_copy = original_list.copy()  # Create a copy of the original list
    list_copy.append("Strawberry")  # Modify the copied list
    return list_copy

# Original list
fruits = ["Apple", "Banana", "Cherry"]

# Call the function
new_fruits = add_strawberry(fruits)

# Check the results
print("Original list:", fruits)   # ['Apple', 'Banana', 'Cherry']
print("Modified list:", new_fruits)  # ['Apple', 'Banana', 'Cherry', 'Strawberry']