Option 4, "retreated," best completes the text using the rules of Standard English by employing the past tense verb to describe a completed action in the past.

The correct answers are "gets" and "will go." These choices use the present simple tense for a condition (the weather getting warmer) and the future simple tense for a result (going for a picnic) following the rules of Standard English.

The correct answer is "will seize." This choice completes the text in adherence to Standard English rules by using the future tense to indicate the possibility of this action taking place, contingent on the prerequisite condition (the weather improving).

Option 2, "had been ongoing," completes the text in adherence with the rules of Standard English by using the past perfect continuous tense to describe a previous ongoing action that concluded before another past event (the arrest).

Option 2, "noticed," is the correct verb tense for this sentence, according to the rules of Standard English. The past tense of "notice" is appropriate here, as the sentence describes a completed action that occurred in the past.