What is meaning of the sentence..
"Apple falling from a tree"..​

An apple falls from a tree because of gravitational between the earth and apple. ... Newton's law of gravitation obeys Newton's 3rd law of motion i.e., forces of attraction between any two object ate equal and opposite. Hence F1 and F2 are equal.

Or..? ⬇️

This is the tree from which it is reputed that Newton saw an apple fall in the late summer of 1666 and which caused him to speculate upon the nature of gravitation. ... he first thought of his system of gravitation which he hit upon by observing an apple fall from a tree , The incident occurring in the late summer of 1666.