question: The moon is unable to hold in all the planets because it is
choices.text: more massive less massive
choices.label: A B
para: The greater the mass of the objects, the stronger the gravitational pull between them.
para_anno.effect_prop: gravitational pull
para_anno.cause_dir_str: greater
para_anno.effect_dir_str: stronger
para_anno.cause_dir_sign: MORE
para_anno.effect_dir_sign: MORE
para_anno.cause_prop: mass
question_anno.less_effect_dir: unable to hold in
question_anno.less_cause_prop: massive
question_anno.less_effect_prop: planets
question_anno.less_cause_dir: planets