の年齢を考慮

consider someone's age

→ の
phrase Rare #22,170
consider someone's age Usually followed by する or に入れる: の年齢を考慮する means "to consider someone's age," while の年齢を考慮に入れる means "to take someone's age into consideration."
JA: 相手の年齢を考慮して、説明の仕方を変えました。
EN: I changed the way I explained it, taking the other person's age into consideration.

あの子の年齢を考慮しないといけません

We have to take that child's age into consideration.

小さな子に手助けしてもらう時はその子の年齢を考慮してやらねばなりません

When asking a young child to help, you need to take their age into consideration.

の年齢を考慮する必要がある

We need to take his age into consideration.

弁護士は裁判官被告人の年齢を考慮するように求めた

The lawyer asked the judge to take the defendants’ ages into consideration.

弁護人裁判官被告人たちの年齢を考慮するように求めた

The defense attorney asked the judge to take the defendants’ ages into consideration.

の年齢を考慮に入れた方がよい

You should take his age into consideration.