<span>The irony is written in the Phrase 3 given in the question.
Irony is a discrepancy or an incongruence between what is anticipated and to what it actually is. There are three types of irony. One would be verbal irony which, as the name suggests, revolves around speaking or what is said. The other two would be dramatic irony and situation irony. Dramatic irony is usually used in plays, dramas, and the like that involves the audience's awareness. Situation irony would be more involved with what's happening around.</span>
Yes, we do not know if this planet will one day be too old and we need to be prepared or at least know
A likely result depends on the situation the person is in for example some one is just wanting to see what its like or someone else might take it to feel a type of way im not to sure what it feels like so i cant be exact on the feeling
The sentence that is a compound sentence would be B. Since it provides 2 mail points or actions combined within a single sentence, there are 2 main events occurring within the sentence whereas the other options only describe one.
Mark saw the kangaroo, but he didn't take a picture.
Both Mark seeing the kangaroo and not taking the picture are these events combined within this sentence.