Final answer:
The amount Mr. Gold received for the stocks after a loss of d dollars is represented by 1,000 - d.
Step-by-step explanation:
If Mr. Gold invested $1,000 in stocks and lost d dollars when he sold them, the amount he received from the sale would be represented by the initial investment amount minus the loss, which is 1,000 - d. Therefore, the correct answer to represent the amount he received for the stocks after the loss is b) 1,000 - d.