At the start of the summer in June, the Northern Hemisphere is tilted towards the sun due to the Earth's axial tilt. As a result:
- Location E, at the Tropic of Cancer (approximately 23.5° N latitude), will receive more direct sunlight during this time, leading to warmer temperatures.
- Location F, at the equator, receives relatively consistent sunlight throughout the year, but during June, the Tropic of Cancer is experiencing summer.
Thus, the best choice is:
Location E, because Earth's axis is tilted towards the sun.