What are the particles floating around the nucleus of the atom

Which sentence has an adjective clause? a.mike rode his bike on mountain trails because he found them challenging.b.gary donated to charity whenever he could.c.liz,who could always make people laugh,was loved by the whole block.d.ever since adam was a little boy,he had his father in the fields

Plzz me between what two words does the ellipses appear in the following sentence? "the his breakfast." "the" and "cat" "cat" and "ate" "ate" and "his" "his" and "breakfast"

Used for an event that has been completed before the present moment in time. simple past past perfect perfect progressive past perfect progressive