To Conserve
To Protect
する verb
To preserve and defend something is to conserve and to protect. I won't let you destroy this land I'm trying to protect!
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
自然を保護するために、何ができるか考えてみましょう。
Let's think about what we can do to conserve nature.
警察は新宿駅近辺を一人で歩いていた少女を保護した。
The police took the girl who was wandering by herself near Shinjuku Station into protective custody.
あそこで虫をついばんでいる鳥は、国際間で保護することが取り決められた鳥です。
The bird pecking at worms over there is actually an endangered bird species and is to be protected worldwide.