Как правильно дать определение?

  • Например:
    1) Leopard this wild predatory animal of the cat family.
    2) А leopard this wild predatory animal of thecat family.
    3) Leopard is wild predatory animal of the cat family.
    4) A leopard is wild predatory animal of the cat family.
    5) Leopard—wild predatory animal of the cat family.
    6) A leopard—wild predatory animal of the cat family.

    Или как-то иначе?
    А если слово во множественном числе?
    Для всех ли слов правила одинаковы?

  • 4) A/The leopard is a wild predatory animal of the cat family.