Both primary and secondary succession have pioneer species that-

There are two types of succession. The first is primary succession. Primary succession occurs in an area that has not been previously occupied by a community. Places where primary succession occurs
include newly exposed rock areas, sand dunes, and
lava flows. Simple species that can tolerate the often-
harsh environment become established first. These organisms help enrich the soil, allowing other species to become established. The first organisms to appear in areas of primary succession are often mosses or lichens. These organisms are known as pioneer species because they are the first species present; pioneer species must be hardy and strong, just like human pioneers.

Then it is june the conclusion to the second sentence is just restating "if it is june then it is summer"

Bees shall never produce milk no matter what but this is a joke and the answer is a breast that produces milk.