'Answer' in the Bible

He could not answer Abner another word, because he feared him.

They looked, but there was none to save; even to Yahweh, but he didn't answer them.

So Gad came to David, and told him, and said to him, "Shall seven years of famine come to you in your land? Or will you flee three months before your foes while they pursue you? Or shall there be three days' pestilence in your land? Now answer, and consider what answer I shall return to him who sent me."