Explanation
Express that something is understandable or reasonable.
Formation
Verb-casual + のももっともだ, い-Adjective + のももっともだ, な-Adjective + なのももっともだ, Noun + なのももっともだ
Detailed explanation
The ～のももっともだ grammar point is used to express that a situation, action, or feeling is understandable or reasonable, considering the circumstances. The formation differs depending on whether it is used with a verb, い-adjective, な-adjective, or noun.
Examples
彼が緊張するのももっともだ。
Kare ga kinchou suru no mo mottomo da.
It's understandable that he is nervous.
この問題が難しいのももっともだ。
Kono mondai ga muzukashii no mo mottomo da.
It's reasonable that this problem is difficult.
彼女が幸せなのももっともだ。
Kanojo ga shiawase na no mo mottomo da.
It's understandable that she is happy.
彼がリーダーなのももっともだ。
Kare ga riidaa na no mo mottomo da.
It's reasonable that he is the leader.
Practice
Grammar content sourced from hanabira.org.