Answer:
Equatorial region
Step-by-step explanation:
The change of season occur due to tilt of the Earth and revolution of the Earth around the Sun. Due to these 2 factors the altitude of the Sun keeps changing in the sky. As the altitude changes the angle at which sun rays are hitting the ground also changes. If the rays hit directly temperature will increase if they are slant temperature will decrease. If you notice the change in the altitude of the Sun for various location on Earth you will find that on Equator the altitude of the Sun will vary from 66.5° to 90°. In this change of altitude the slantness of the Sun rays will be very less. Due to this the change in the surrounding due to season change will not be that prominent.
You can see that the regions near equator have almost same kind of condition throughout the year. Temperature also doesn't vary that much.