The correct answer is option 1. The term "normal lapse rate" refers to the rate at which atmospheric temperature changes with increasing altitude in a stable atmosphere. According to this, temperature is highest at ground level and decreases with increasing altitude, hence option 1 is correct.

Option 2 is not correct because in a normal lapse rate, temperature doesn`t increase with altitude, it decreases.

Option 3 is incorrect because temperatures do not remain stable with increasing altitude. The atmosphere heats from the ground up, hence temperatures decrease as you gain altitude.

Option 4 is also incorrect as it suggests a positive temperature change initially with increasing altitude, which does not occur under the normal lapse rate. Instead, the temperature decreases continuously as altitude increases.