اضف الى معلوماتك:اعداد ابو بيشو (متجدد)

[ابو بيشو]

المشاركة الأصلية كتبت بواسطة Rahman21

The following sentences are metioned in the 4th unit
Please Tell me what do you think of them
1-If only one bird pulled a string, the box did not move.
2-However, if both birds pulled the strings at the same time, they moved the box and got the food.

Thanks a lot . This is an example to show that animals also co-operate
This is a recent experiment to prove that .One bird cannot do what a group of birds can do.
Thanks a lot .