It's difficult to explain because they mean very similar things, but I would say: Efficient means when a certain machine or person does things to a good standard and..Effectively means this but more generally, when anything in the world does something to a good standard
i am very effective at communincating
most effectively
Effective(ly) is one
Effective business communication alleviates the major problems of communication because it helps people communicate effectively across different departments.
What are the principles of effective communication
No, it is an adjective. the adverb form is "effectively." (it can mean "in an effective manner" or "having the result of")
By having effective emergency service.
it is the way of sending messages effectively
no its a proverb
Very effective is bee venom.
making oral communication more effective
because the curriculum should be effectively followed for effective learning.