Food chain in local habitat

What is " habitat"

• The habits of people and how they behave

• Hobbies of students

• Place where animals and plants live

What is the relationship between the living things in the same habitat

• Feeding relationship

• Friendship

• Neighbors only

How we can depict the feeding relationship between living things:

• By a nice drawing

• By food chain

• By taking picture of them

If I want to say that caterpillar is eaten by the bird. We should write

• $caterpillar\ \rightarrow\ Bird$

• $Caterpillar\ \leftrightarrow\ Bird$

• $Caterpillar\ \leftarrow\ Bird$

If I want to say the insect eats the plants. I should write :

• $INSECT\ \rightarrow\ PLANT$

• $INSECT\ \leftrightarrow\ PLANT$

• $PLANT\rightarrow INSECT$

 $\rightarrow$  : this arrow in food chain means: 

• Eat

• Eaten by

• Live in