tell me about any one teaching of the above preacher?
He taught that the primary doctrine of Islam was the uniqueness and unity of God
Muhammad ibn Abd al-Wahhab
 He taught that the primary doctrine of Islam was the uniqueness and unity of God ("Tawhid"). He also denounced popular beliefs as polytheism (shirk), rejected much of the medieval law of the scholars (ulema) and called for a new interpretation of Islam.

bahrain is famous for its oil and what else Modern Arab culture and the archaeological legacy of five thousand years of civilization where is this place located? In the Persian Gulf between the Qatari peninsula and the north eastern coast of Saudi Arabia was there any dynasty present in this last place that you have mentioned just now? Yes. Saud dynasty who established it? Muhammad bin Saud when/ 1744 with whom did this mention person form an alliance? Muhammad ibn Abd al-Wahhab what was the reason behind it? To provide the ideological impetus to Saudi expansion this second person you mentioned, was he a preacher? Yes. He was a religious leader, Islamic scholar and theologian how is he recognized? The national mosque of Qatar, the "Imam Muhammad ibn Abd al-Wahhab Mosque" is named after him, why is this last mentioned mosque controversial? In 2012, the mosque banned children from entering the mosque during "tarawih" prayers in the month of Ramadhan what is meant by this term within inverted commas? Tarawih refers to additional ritual prayers performed by Muslims at night after the Isha prayer during the holy month of Ramadan from where did this last term originate? It derives from the Arabic root "R-M-Ḍ" "scorching heat" when does it start? UNANSWERABLE can you tell me what is it exactly? It is the ninth month of the Islamic calendar, observed by Muslims worldwide as a month of fasting, prayer, reflection and community how is it related to polar regions? In polar regions, the period between dawn and sunset may exceed twenty-two hours in summer so some Muslims follow the fasting schedule observed in the nearest city that experiences sunrise and sunset, while others follow Mecca time is any kind of crime done during this period? The correlation of Ramadan with crime rates is mixed can you state any architectural feature of the mosque we were talking about? It is built in traditional Arab style with modern features
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Muhammad ibn Abd al-Wahhab [SEP] Teachings
It preaches that worship in Islam includes conventional acts of worship such as the five daily prayers ("salat"); fasting ("sawm"); supplication ("Dua"); seeking protection or refuge ("Istia'dha"); seeking help ("Ist'ana" and "Istighatha") of Allah. Ibn ʿAbd al-Wahhab was keen on emphasizing that other acts, such as making "dua" or calling upon/supplication to or seeking help, protection or intercession from anyone or anything other than Allah, are acts of "shirk" and contradict the tenets of tawhid and that those who tried would never be forgiven.