1. Fate's Decree' Means:

1:Luckily

2:Unfortunately

3:by chance

4:fortunately

2. They were roaming aimlessly

Aimlessly is:

1:verb

2:noun

3:pronoun

4:adverb

3. You should abide by the rules

Abide is:

1:Phrasal verb

2:noun Phrase

3:Objective phrase

4:adverb Phrase

Same meaning of any word is called its synonym.

1) Fate's decree means

Ans="2) Unfortunately [✔✔✔]

An adverb is a word which modify action, state, place of event, time of event taken with Noun, Pronoun and how action done in verb etc.

2) They were roaming aimlessly

Aimlessly is:

Ans="4) Adverb [✔✔✔]

Objective phrase is a phrase which describe what we saying about subject.

3) You should abide by the rules.

Abide is:

Ans="3) Objective phrase