It is sometimes at night in kano (a) cold (b)colder​

It is sometimes cold at night in Kano.

Explanation:

It is not in past tense or comparing. It is not colder at night in Kano. It is cold at night in Kano.

colder

Explanation:

The months of April, May and July have a high chance of precipitation. Kano has dry periods in January, February and August. The warmest month is April with an average maximum temperature of 38°C (100°F). The coldest month is December with an average maximum temperature of 29°C (84°F).

a progressive heart disease that affects pumping action of the heart muscles.

there are men and women, some choose to be both or change their gender. often times those people go by "other". those who change their gender are known as "transgender"