Because loss of habitat is the cause of endangerment of most species, designation and preservation of habitat is a vital part of Endangered Species Act procedures.
(loss of habitat; is; the cause of endangerment of most species) (designation and preservation of habitat; is; a vital part of Endangered Species Act procedures)
loss of habitat designation and preservation of habitat
is is
the cause of endangerment of most species
a vital part of Endangered Species Act procedures