彼らは助けを求めて叫んだ。

they (usually male); them

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

assistance; help; aid; support; reinforcement

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to want; to wish for; to request; to demand; to seek; to search for; to pursue (pleasure); to hunt (a job); to purchase; to buy

to shout; to cry; to scream; to shriek; to yell; to exclaim; to clamor (for or against); to clamour (for or against)