Contractions with Pronouns and Not

(I am) writing a report about animals and their habitats.

• I'am
• I'm
• I'd
• It's

I think (it is) interesting to learn about animals and where they live.

• i'ts
• its'
• it's
• its

Dad says that (he has) seen an eagle's nest.

• he's
• hes'
• h'es
• he'es

(I have) only seen one in a picture that shows the eagle's nest high up in a tree.

• I have
• I've
• Iv'e
• Ive'

(They are) known for building huge nests.

• their
• they're
• theyr'e
• there

Is the word in parentheses a "contraction" or a "possessive pronoun?" 
I hope (it's) not too late to enter the science fair.

• possessive pronoun
• contraction

Is the word in parentheses a "contraction" or a "possessive pronoun?"
Lin and Gary showed me (their) science project.

• possessive pronoun
• contraction

Is the word in parentheses a "contraction" or a "possessive pronoun?"
I want to ask if (they're) finished with it.

• possessive pronoun
• contraction

Is the word in parentheses a "contraction" or a "possessive pronoun?"
Have you planned (your) project yet?

• possessive pronoun
• contraction

I like _____ new backpack

• your
• you're