Tran made the timeline below to show the order in which great scientific theories were developed. theory of gravity à cell theory à ? À theory of continental drift Which theory belongs in place of the question mark in Tran's timeline? Aristotle's atomic theory Newton's laws of motion Copernicus's heliocentric theory Darwin's theory of natural selection

The correct option is;

Darwin's theory of natural selection

Explanation:

(A) The theory of gravity was introduced Sir Isaac Newton in the published work of Philosophiae Naturalis Principia Mathematica which consisted of three books on the 5th of July 1687

(B) In 1839, and 1858,  Theodor Schwann and Rudolf Virchow, respectively proposed the cell theory which consisted three parts viz

1) Cells are the building blocks of organisms

2) The cell is the fundamental life unit

3) Cells come from other preexisting cells

The first two parts was proposed by Theodor Schwann in 1839, while the third part was proposed by Rudolf Virchow, in 1858

(C) In 1859, Charles Darwin proposed the theory of natural selection in his book the "On the Origin of Species" which is the process by which an organism change so as to survive ad reproduce in its environment

(D) In 1912, Alfred Wegener, proposed the theory of continental drift.

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

increased stability in the completion of fluorine's outer shell.