Help the visiting alien complete their apology letter to Earth's leaders by dragging the correct words into the blanks.

The alien commander ordered a retreat since the humans were armed with terrifying water guns.

We must decline your offer of cheese, mainly because our spaceship is severely allergic to dairy.

Our ambassador is hiding under the table as he saw a tiny spider in the meeting room.

The alien commander ordered a retreat since the humans were armed with terrifying water guns.

We use the conjunction since to introduce an adverb clause of reason (subject + verb). "Due to" is incorrect because it must be followed by a noun phrase, and "therefore" indicates a result, not a reason.

We must decline your offer of cheese, mainly because our spaceship is severely allergic to dairy.

Because is a subordinating conjunction followed by a full clause ("our spaceship is..."). "Because of" is a preposition and can only be followed by a noun or pronoun.

Our ambassador is hiding under the table as he saw a tiny spider in the meeting room.

As functions exactly like "because" or "since" here to introduce the reason for his hiding. "Despite" shows contrast, and "so" shows a result.