The Moscow zoo has many sightseeing programs. According to its website, you can order a group or individual excursion. In some cases the zoo invites visitors to its "warm" excursions. What is a "warm" excursion?

• It is an excursion in a covered pavilion.
• It is an excursion during which a visitor is offered a cup of warm tea.
• It is an excursion which is organized for a group of relatives.
• It is a summer excursion.