Final answer:
In the expression a + (b + 1) + 2c, the entire expression is a sum and 2c is a product.
Step-by-step explanation:
The entire expression is a sum with a + (b + 1) + 2c. This means that we are combining different terms using addition.
On its own, 2c is a product with 2 being multiplied by c. This means that we are multiplying a number by a variable.