This is a question about a sentence on Satori Reader.
The sentence is:
The translation given is:
That’s because he was a kind older brother who looked after Haruko well.
My question is what よく is doing here. The yoku, if you mouse over it on the site, is listed as “frequently/often”. The translation has no frequently, but includes “that’s because” without any vocabulary that corresponds. Is that just context?
Can yoku mean because in this situation?