 <translate> There are no production facilities built to manufacture birds nests, birds build the nests themselves. The answer is Sentence A. <yor> Kò sí àwọn ilé iṣẹ́ tí wọ́n fi ń ṣe ìtẹ́ ẹyẹ, àwọn ẹyẹ fúnra wọn ló ń ṣe ìtẹ́ náà. Ìdáhùn náà ni Ìran A. 