Q1:

S₁: Growing up means not only getting larger, but also using our sense and our brain is to become more aware of things around us.

P : Not only does he have a memory but he is able to think and reason.

Q : In this, man differs from all other animals.

R : Before we spray our roadside plants or turn sewage in to our rivers, we should pause to think what the results of our action are likely to do.

S : This is to say, he is able to plan what he is is going to do in the light of his experience before he does it.

S₆: In other words, we must develop and use our ability to reason, because the destruction or the preservation of the places in which we live depend on us.

The Proper sequence should be:

Question

S₁:	Growing up means not only getting larger, but also using our sense and our brain is to become more aware of things around us.
P :	Not only does he have a memory but he is able to think and reason.
Q :	In this, man differs from all other animals.
R :	Before we spray our roadside plants or turn sewage in to our rivers, we should pause to think what the results of our action are likely to do.
S :	This is to say, he is able to plan what he is is going to do in the light of his experience before he does it.
S₆:	In other words, we must develop and use our ability to reason, because the destruction or the preservation of the places in which we live depend on us.

The Proper sequence should be:

Ordering of Sentences