the is used for any perticular thing ..
as , if we are talking about any perticular horse ,then we should use 'The horse' but here we are talking about all horses so no need to put 'The' before horse
The horse eat the apple
For most verbs, we add s when using with he/she/it or a singular noun
He/She/It/Ram/The horse eats/drinks/runs
For I/you/we/they or plural nouns, we do not add s
I/you/we/they/Ram and Rahim eat/drink/run
an apple hona chahiye tha na to galat kyu hai....ya fir mai kyu galat hu