Question

Which word in the sentence is the direct object?

Answer 1

 The direct object is what fills the gap of :

THE_SUBJECT +verb+ _______

So for example

Klara (Subject) loves (verb) kittens (direct object).

In our sentence this is equivalent to "crops":

Farmers (subject) plant (verb) crops (direct objects) 
 

Answer 2

Answer:

a. Crops

Explanation:

Crops is the Direct Object or DO because it can't replace or describe the noun.