Question

my dog is rather ____, bumping into things whenever he runs around the yard. awkward ancient relying doubts clumsy

Explanation:

We need to choose an adjective that describes the dog's behavior of bumping into things. "Clumsy" means awkward in movement or handling things, which fits the context of the dog bumping into things. "Awkward" can also mean clumsy but "clumsy" is more specific to physical movement clumsiness here. "Ancient" is about age, "relying" is a verb form, and "doubts" is a noun or verb related to uncertainty, so they don't fit.

Answer:

E. clumsy