Seed is the first step of planting.
Root is the second step of Planting.
Stem is the third step of planting.
Flower is the fourth step of planting.
Crop is the fifth step of planting.
So arrangement would be as below
4, 2, 3, 5, 1

This is the food chain cycle for animals.
First Step of food chain cycle is Grass.
Second Step is Grasshopper because grasshopper eat Grass.
Third Step is Frog because Frog eat grasshopper
Fourth Step is Snake because Snake eat Frog.
Fifth Step is Eagle because Eagle eat Snake.
The arrangement would be as below,
5, 3, 1, 4, 2

The arrangement should be like morning to Night.
Morning is the first and Night is the last.
Twilight ? Noon ? Dawn ? Night

5 4 3 2 1

This is all related to water.
2, 4, 1, 3

Arrange As per dictionary alphabets.
all are same Up to Sil
Then we will compare between silicon and silicate.
Both words are same up to Silic.
Then remaining on and ate , a came first, then Silicate will be first in dictionary.
second position will be Silicon in dictionary.
Now Silt and Silken.
k comes before t, So Silken will be 3rd position in dictionary and Slit will be 4th position.
Now arrange the words as per given above explanation
3, 2, 4, 1

Electron is the smallest and Matter is the biggest in the given group.
arrange the given words accordingly.

Atom is made by Electron.
Molecule is made by Atom.
Matter is made by Molecule.

electron is smallest after that atom then molecule and last one is matter.
4 < 1 < 3 < 2

Sand is smallest and Hill is biggest.
Stone is made by Sand.
Rock is made by Stone.
Boulder is made by Rock.
Hill is made by Boulder.
So arranging in order of size .
Sand ,Stone, Rock, Boulder , Hill
2, 1, 3, 4, 5

Meaningful order of words:
(iv) Eggs ? (ii) Larva ? (i) Pupa ? (iii) Moth

5. Sensation ? 2. Perception ? 4. Assimilation ? 3. Scheme Formation ? 1. Accommodation