Sentence review

Would someone be willing to review these 4 sentences for me and ensure the following: No grammar/punctuation mistakes and is

sentence 1: a simple sentence,

sentence 2: compound,

sentence 3: complex,

sentence 4: compound-complex

1. Success in a professional environment is largely dependent on one's ability to communicate effectively.
2. Communication entails sending/receiving a message, and the exchange of non-verbal cues which allows one to communicate more effectively.
3. Although it was Aristotle who identified the three forms of appeal, a modern-day professional must still utilize these early tactics of communication.
4. A rhetorical discourse occurs as a response to a situational need, and has influential characteristics, capable of persuading an audience; therefore creating a practical need for rhetorical investigation and discourse.

Thanks!