Choose the most appropriate reported construction of the following se…

The correct answer is Option (4) → The site engineer told the workers to stack those bricks there before the truck arrived.

Changing an order into indirect speech:

Change	Direct	Indirect	Why
Reporting verb	said to the workers	told the workers	The engineer gives an order. So “said to” becomes “told” + person.
To + verb	Stack	to stack	An order is reported with “to” + verb. So “Stack” becomes “to stack”.
Tense change	arrives	arrived	“Arrives” is in the simple present. The simple present is formed with the base form (V1), or V1 + s / es with he, she, it. After the past “said” it becomes the simple past “arrived”. The simple past is formed with the past form of the verb (V2).
Time and place words	these, here	those, there	The words are reported later, away from the site. So “these” becomes “those” and “here” becomes “there”.
Full sentence	The site engineer said to the workers, “Stack these bricks here before the truck arrives.”	The site engineer told the workers to stack those bricks there before the truck arrived.

“Now” in an order becomes “then” in the same way. Example: The coach said to the players, “Start the warm-up now.” → The coach told the players to start the warm-up then.

Why the Other Options are Incorrect?

Option 1: The site engineer told the workers that stack those bricks there before the truck arrived. — Incorrect. “That stack” keeps the spoken order after “that”. An order is reported with “to” + verb: “to stack”.

Option 2: The site engineer told the workers to stack these bricks there before the truck arrived. — Incorrect. “These” is left unchanged. In the report it becomes “those”.

Option 3: The site engineer told to the workers to stack those bricks there before the truck arrived. — Incorrect. “Told” takes the person straight after it. The “to” before “the workers” is wrong.