2. What is unique about Earth's tides when the sun,
- moon, and Earth are in this configuration?

both commonly called spring tides.

Explanation:

When the sun, moon, and Earth are in alignment (at the time of the new or full moon), the solar tide has an additive effect on the lunar tide, creating extra-high high tides, and very low, low tides

the answer to you question is   jet streams

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.