。
The trees protect my house from the wind.
Literal
Tree [subject-が] my [possessive-の] house [object-を] wind [from-から] protecting-gives-me [is-ている].
守ってくれる ('protects me / protects [for my benefit]') uses the giving-verb auxiliary ~てくれる, which marks an action done for the speaker's benefit by someone else. Attaching it to 守る ('to protect') expresses gratitude for the protection. から marks the source of the threat — 'from the wind.'