Question

1. in

a) article
b) preposition
c) verb
d) pronoun

1. the

a) article
b) noun
c) verb
d) adjective

1. summer

a) article
b) noun
c) verb
d) pronoun

1. happy

a) article
b) noun
c) verb
d) adjective

1. children

a) article
b) adjective
c) noun
d) preposition

1. play

a) preposition
b) article
c) verb
d) adverb

1. enthusiastically

a) conjunction
b) adverb
c) verb
d) pronoun

1. in

a) article
b) pronoun
c) preposition
d) conjunction

1. the

a) article
b) noun
c) verb
d) pronoun

1. park

a) article
b) adjective
c) noun
d) pronoun

Explanation:

1. "In" is a preposition that shows a relationship of place, time, etc.
2. "The" is a definite article used before nouns.
3. "Summer" is a noun referring to a season.
4. "Happy" is an adjective that describes a state or quality.
5. "Children" is a noun, the plural form of "child".
6. "Play" is a verb that indicates an action.
7. "Enthusiastically" is an adverb that modifies a verb, adjective, or other adverb.
8. "In" is a preposition.
9. "The" is an article.
10. "Park" is a noun referring to a public green - space.

Answer:

1. b) preposition
2. a) article
3. b) noun
4. d) adjective
5. c) noun
6. c) verb
7. b) adverb
8. c) preposition
9. a) article
10. c) noun