Correct Answer: Philanthropist

Solution : The correct choice is the fourth option .

A philanthropist is a person who has a love for mankind and actively seeks to promote the welfare of others by donating money, resources, or time to charitable causes.

The meanings of other options are as follows:

• A pessimist is a person who tends to see the negative side of things and expects the worst outcome.
• A misogynist is someone who dislikes or has a strong prejudice against women.
• An optimist is a person who generally has a positive outlook on life and expects favourable outcomes.

Therefore, the correct answer is philanthropist.