由于、因为
Explanation
“由于”和“因为”都用于引出原因或目的。“由于”多用于书面语，侧重客观原因；“因为”更口语化，适用范围广。
"由于" and "因为" both introduce reasons or purposes. "由于" is more formal and emphasizes objective causes, while "因为" is more colloquial and widely used.
Examples
由于各种原因，大家没有接受他的意见。
Due to various reasons, everyone did not accept his opinion.
他因为这件事一直不跟我说话。
He hasn't been speaking to me because of this matter.
Related Grammar Points
为了HSK 3三26
词类 · 引出目的、原因
用于引出行为的目的或原因，表示“为了某个目标而做某事”。
Used to introduce the purpose or reason for an action, indicating "for the sake of" or "in order to achieve" a certain goal.
Examples (2)
妈妈为了健康坚持每天跑步。
Mom insists on running every day for the sake of her health.
他为了新工作不断学习新知识。
He keeps learning new knowledge for his new job.