The Five Pillars of Islam include specific acts of worship and practices that are required of Muslims. Among the options you provided, the correct answer is:
- making an annual hajj
This is one of the Five Pillars of Islam, which states that Muslims who are physically and financially able must make the pilgrimage to Mecca at least once in their lifetime.
The other options do not correspond to the Five Pillars:
- Daily services at a mosque are not mandated as a Pillar, though congregational prayers (Salah) are important.
- Donating money to charity is part of zakat, which is another of the Five Pillars.
- Abstaining from eating on Wednesdays is not a requirement in Islam.