Question

The water in this lake seldom is freezing/freezes in winter. Water doesn't exist/isn't existing on the Moon.

Answer 1

Вода в этом озере редко замерзает/замерзает зимой. Вода не существует / не существует на Луне. НЕ ПОНЯЛА ЧТО ТЫ ХОТЕЛА ЭТИМ СКАЗАТЬ
ПОПОДРОБНЕЕ

Answer 2

1. Seldom freezes (seldom=rarely (редко) указывает на повторяемость действия, поэтому Present Simple)
2. Doesn't exist (это высказывание - всеобщая истина (воды на луне нет), поэтому опять же Present Simple)

Answer 3

That's correct. The statement about the lake suggests that it rarely freezes or remains unfrozen during winter. It implies that the lake's temperature is usually above freezing point even in the colder months.

Regarding water on the Moon, current scientific understanding indicates that water does exist on the Moon, although in very small quantities. In the past decade, various missions and studies have provided evidence of water ice on the lunar surface, particularly in the permanently shadowed regions near the Moon's poles. The presence of water on the Moon is an exciting discovery with significant implications for future lunar exploration and potential resource utilization.