His father was a king over a great land

what is the subject

The subject of the sentence "His father was a king over a great land" is "his father."

Explanation:

The subject is the topic of a sentence, what the sentence is about, what it talks of. The subject is supposed to have a "relationship" with the verb, that is, the verb has to agree with the subject - singular or plural, for instance.

The sentence "His father was a king over a great land" is talking about "his father". The verb "was" agrees with the subject - third-person singular. The rest of the sentence after the verb is what we call predicate. It consists of information about the subject. Thus, we are talking about "his father" - which makes it the subject -, and we are saying that he "was a king over a great land" - verb +predicate.

in what passage i'm sorry but i don't see anything there.

the development of trade during the middle age increased to the change given in the agriculture, which gave money, industry and markets a bigger importance in economy. the agriculture production was more than the consumption, which meant the creation of wider markets out of the areas. besides, with the end of multiple wars, the population increased and new trade routes were created.