Yes
It can.
Internal would be an adjective descrbing conflict, which would be a noun. The internal conflict is also a term used for a type of conflict in a story.
external
Internal conflict and climax cannot be the same thing, because the climax of a story is part of an element of the plot diagram of a story whereas conflict is an element in and of itself of a story. The conflict creates the basis for the story. The climax is a certain part of the story where the climax reaches the point where it has to be resolved one way or another.
Internal conflict
external conflict; internal conflict
descibe both internal and external conflict in this story
means nothing
When Joseph died
Internal would be an adjective descrbing conflict, which would be a noun. The internal conflict is also a term used for a type of conflict in a story.
the conflict in milkweed is external because my characters in the story are experiencing it.
The main conflict in the story "Miss Brill" is internal conflict. Miss Brill struggles with feelings of loneliness and disillusionment as she comes to terms with the reality of her existence and her place in the world. This internal conflict drives the narrative and shapes Miss Brill's emotional journey throughout the story.