Question 1
The correct answer is d.
The possessive nouns are nouns that we use to express that a person or an object belongs to someone or something. We usually make them by adding apostrophe ('s) on the noun itself:
<em>boy's</em>
<em>mum's</em>
<em>Kate's</em>
In this particular case, we can notice that the sentence d. My dream is that one day my garden will be just as beautiful and productive as Sandy's! has a possessive noun and it is Sandy's.
SANDY (noun) + 'S = SANDY'S (possesive noun)
The other examples show the use of the possessive PRONOUNS.
a. Everything I know about gardening I learned from <u>my</u> good friend Sandy.
b. When she showed me <u>her</u> big, healthy, vegetable garden and offered me some gardening tips, I decided to listen hard.
c. Then she taught me how to cultivate rich and healthy soil and helped me identify which types of plants are best for the environment in <u>my</u> yard.
Question 2
The correct answer is c.
Proper nouns express a <u>unique person/object and become with capital letters</u>. All the other are<u> common nouns</u> (garden, soil, environment).
Question 3
The correct answer is c.
The present participle is the form we get when we add 'ing' to the verb.
<em>dig + ing = digging </em>
...as it appears in the example: A few weeks later, when I was digging up seeds that had not even sprouted yet, Sandy came over to introduce herself with a basket of fresh produce from her garden.