The children are posing gives less details than the first sentence.
This justifies what answer for what question? Q & A: 
Premise: "Two adults and two children pose on a pile of rocks."
Hypothesis: "The children are posing."
Do we know that the hypothesis entailed by the premise?
yes
The children are posing gives less details than the first sentence.
This justifies what answer for what question? Q & A: 
user
Premise: "Two adults and two children pose on a pile of rocks."
Hypothesis: "The children are posing."
Do we know that the hypothesis entailed by the premise?
yes
assistant
The children are posing gives less details than the first sentence.
This justifies what answer for what question? Q & A: 
Premise: "Two adults and two children pose on a pile of rocks."
Hypothesis: "The children are posing."
Do we know that the hypothesis entailed by the premise?
yes