Force on electrons opposes electric field direction

Steps:

• Electric field points away from positive sphere and toward negative sphere.
• Force on electron (negative charge) is opposite to electric field vector: $\vec{F} = q\vec{E}$, where $q < 0$.
• At each electron's position, identify field direction based on proximity to spheres.
• Compare shown force arrow to expected opposite direction.

Why A is correct:

• Arrow at A points opposite the field (toward positive sphere), matching $\vec{F} = q\vec{E}$ for negative charge.

Why the others are wrong:

• B: Arrow aligns with field, as if for positive charge.
• C: Arrow points toward negative sphere, following field instead of opposing it.
• D: Direction ignores local field from both spheres, showing incorrect opposition.

Final answer: A