He had really bad hand-eye coordination, so playing baseball was what?\nOptions:\n- very popular in japan\n- round\n- fun to play\n- a challenge\n- hard
Let's think step by step below.
hard
Baseball is a game where a ball is hit by a bat.

One needs to see the ball coming and hit it with bat in hands at the correct moment.

Hand-eye coordination is necessary to move hands in correct moment while seeing something.

.

Final answer: hard