Give is the opposite of Attempt. Attempt is a synonym of Aim. 
Charge is a synonym of Commitment. Commitment is a synonym of Need. Organism can Need. Organism is part of Ecosystem. 
Give <--Antonym--> Attempt <--Synonym--> Aim 
Charge <--Synonym--> Commitment <--Synonym--> Need <--CapableOf-- Organism --PartOf--> Ecosystem 