From the choices provided below, select the pair of words that appropriately fills the blanks in the sentence in the correct order to complete its meaning.

Odin's lawful ___________________ was Frigg, queen of Asgard; but Freyja is frequently ____________________ with him in Norse poetry.

The correct answer is consort, associated.

Let's analyze the sentence structure and vocabulary step-by-step to see why this pair of words fits best:

1. First Blank:
The sentence mentions "Frigg, queen of Asgard" in relation to Odin. In mythological context and formal English, a spouse, wife, or husband—especially of a reigning monarch—is referred to as a consort. Therefore, "lawful consort" correctly indicates her status as his legal queen/spouse.

2. Second Blank:
The second part of the sentence discusses Freyja's connection to Odin in Norse poetry. The word associated means to be connected or linked with someone or something in thought, literature, or tradition. Saying Freyja is "frequently associated with him in Norse poetry" makes complete grammatical and semantic sense.

Evaluating the other options:
• heathen, accompanied – "lawful heathen" does not fit the context of describing a marriage/royal partner.
• betroth, taken – "betroth" is a verb, but a noun is required after the adjective "lawful".
• kin, referred – "referred" would require the preposition "to" (referred to with him), which is missing.
• believer, preferred – "lawful believer" does not fit the context of describing Frigg as queen/spouse of Odin.

Thus, the pair consort, associated appropriately fills the blanks to complete the meaning of the sentence.