Question

spinach, broccoli, kale, and romaine lettuce belong in the ___ vegetable subgroup.
leafy
nutrient - dense
starchy
dark green

Explanation:

Spinach, broccoli, kale, and romaine lettuce are all dark green in color. The term "leafy" is too broad as many non - dark green vegetables are also leafy. "Nutrient - dense" is a general characteristic that many vegetables (not just this group) can have. "Starchy" refers to vegetables like potatoes which are high in starch, and these vegetables are not starchy. The key characteristic that groups them together is their dark green color.

Answer:

dark green