Rahattakes afterhis father. The underlined part is -

• Rahat takes after his father. The underlined part is - Phrasal Verb.

• Phrasal Verb:
- বাক্যে Verb + preposition/adverb থাকলে সেটা Phrasal Verb হয়।
- যেমন - look down upon, give up, look after.
- তাই এখানে Phrasal Verb (verb + preposition) হচ্ছে phrasal verb.

• Rahat takes after his father.
- এই বাক্যে takes after ' (verb + preposition)
- তাই এটি Phrasal Verb.