A long poem that tells the story of a hero's adventures-

Correct answer: Epic.

• Epic
- An epic is a long narrative poem that tells in grand style the history and aspirations of a national hero.
- However, the term `epic’ could be used to address a novel as well.
- এগুলো সাধারণত সুদীর্ঘ এবং রোমাঞ্চকর হয়ে থাকে।
- অনেক সময় কারো বীরত্বপূর্ণ কর্মের ইতিহাসও তুলে ধরা হয় এই কবিতাগুলোতে।
- However, the term `epic’ could be used to address a novel as well.
- For instance: 'Paradise Lost' by John Milton.

Other options:
ক) Dramatic Monologue
- A kind of lyric poem in which a single speaker expresses his thoughts and feelings to an imaginary listener.
- 'Dramatic monologue' is used in Poetry.
- Robert Browning excels in dramatic monologue in English literature.

গ) Pastoral Elegy
- An elegy which begins with an invocation to the Muses and describes a procession of shepherds who mourn for the misfortune of a fellow shepherd in a pastoral atmosphere.
- In this kind of elegy, nature also takes part in the mourning.

ঘ) Hymn
- A lyric poem or song in praise of God is called a Hymn.
- সাধারণত এটি religious emotion প্রকাশের উদ্দেশ্যে Chorus দ্বারা গাওয়া।
- Edmund Spenser এর 'Foere Hymnes', and John Keats 'Hymn to Apollo' are some of the well-known hymns in English literature.

Source:
1. Britannica.
2. An ABC of English Literature, Dr. M Mofizar Rahman.