4 riddles

1.) When I am a human, I save lives,  but when I turn into my animal form, I will kill. What am I?

2.)I speak without a mouth and hear without ears. I have no body, but I come alive with wind. What am I? 
3.)I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I? 
4.)What is seen in the middle of March and April that can’t be seen at the beginning or end of either month?“Not so fast!” Jaya says. “Now I know

2. echo

3. a map

4. the letter r

Wow

was that right