1. It should be C
2. It has to be B
Depth of field is the distance between the closest and farthest objects in a photo that appears acceptably sharp. Now your camera can only focus sharply at one point. But the transition from sharp to unsharp is gradual, and the term 'acceptably sharp' is a loose one!
Short answer: The pronoun "that" precedes details about the noun that are essential, while the pronoun "which" precedes those that are non-essential or can be eliminated without changing the meaning of the sentence.
Explanation:
In grammar, the function of "which" and "that" is to precede or introduce clauses, especially those that provide information about the noun. Additionally, these two words differ slightly on their function because they introduce specific types of clauses.
Indeed, the use of "that" shows the information introduced is essential or cannot be eliminated as in the sentence "My sister that is living in Europe get married" because the detail "is living in Europe" is essential to define "My sister". This does not occur with "which" because this precedes information that can be eliminated or it is not essential as in "My car, which is brand-new, just broke down" because in this sentence the key information is that the car broke down.
Vas happenin!!
It’s B
Hope this helps
-Zayn Malik
Your answer would be A. Poems should be studied in many ways.