Final answer:
Commercials asking for donations to charities providing for needy children best exemplify the appeal to sympathy.
Step-by-step explanation:
The motivational appeal best exemplified by commercials asking you to give money to charities that provide for needy children is the appeal to sympathy. These commercials aim to evoke feelings of compassion and empathy towards the children in need, with the goal of motivating viewers to donate money for their support. By showing the difficult circumstances faced by these children and highlighting the positive impact that donations can have on their lives, these commercials appeal to viewers' emotions and encourage them to take action.