Put the sentences in the correct order to make a logical text.

They worry about me less now because they know they can contact me at any time. No matter where I am, I can always contact my parents if I need help. Mobile phones are one of the best inventions. This makes me feel secure, and it makes my parents feel safe too.

• Mobile phones are one of the best inventions.
• No matter where I am, I can always contact my parents if I need help.
• This makes me feel secure, and it makes my parents feel safe too.
• They worry about me less now because they know they can contact me at any time.