Using Because Of and Due To

due to 修飾名詞

名詞 + Be 動詞 + due to

The delay was due to heavy traffic. 這個延遲是交通阻塞造成的。

due to 的用法跟 caused by 接近。

The delay was caused by heavy traffic. 這個延遲是交通阻塞造成的。

because of 修飾動詞

The store closed because of heavy rain.因為大雨這店關門了。