Answer:
Make eye contact
Explanation
The rest of the ways listed are not ways to use body language is a formal discussion
Lind's experiments at sea tested some potential cures for scurvy. His experiments were important because he discovered the use of citrus fruit as a cure for scurvy. It ranks as one of the first clinical experiments in the history of medicine.
Petrarch is also known for using the vernacular language in his writing instead of Latin. His vernacular writings were later used to set the foundations of the modern Italian language.
option d is correct for me
A body can which has time and security enough to keep its head' to the longer the longer Senate terms and the advantage it gives to politicians in terms of getting things done since they don't have to worry about reelection so often.