Answer:
1.- d) 2.- a) because you have to identify the element that suffers the effect of the verb caused by the subject.
Step-by-step explanation:
Because the direct object it's a certain an element that experiments the effect of the verb, in this case. I will describe each sentence:
The subject in the first sentence is: "the object in a soccer game" the verb and action are "get it into the goal". And the direct object is: the element that suffers the effect of getting to the goal area. Which is the ball.
The subject in the first sentence is "players" the verb and action are: "kick or head, to their teammates on the field" the object again the ball.