Should a caption be aong sentence or a short sentence?

Should i say parent or parents in a dear parents letter

A psychological disorder characterized by a split between thought and emotion where a person has difficulty distinguishing whether altered thoughts, perceptions, and conscious experiences are real versus what are imagined.

The delegate who created the compromise for the constitution was

List ways landmasses shifted since the Flood.

According to the christian worldview, since this is god's universe and god is good, god can do what he wants and is not obligated to explain himself to humanity.

What made the middle colonies attractive to poor men

Independent candidates are rarely on the texas ballot because

Along its northern and western borders, the Han a could not establish a tributary system. b promoted the establishment of garrison cities and oases as military and farming settlements that became part of the Silk Road.

Which region has fertile valleys

In his 1963 "Letter from Birmingham Jail," Martin Luther King Jr.: a) agreed with white clergy that the civil rights movement was moving too fast.