Which of the following factors should be considered when evaluating environmental conditions for rigging?

When evaluating environmental conditions for rigging, considering factors such as wind speed, ground conditions, and proximity to power lines is crucial because these elements directly impact safety and operational efficiency.

Wind speed is a significant factor since strong gusts can destabilize loads, especially in outdoor rigging scenarios. It can also affect the movement of cranes and other lifting equipment, making it essential to assess this variable before commencing any lifting operations.

Ground conditions are also paramount; they determine the stability of the rigging operation. Uneven, wet, or soft ground can lead to equipment tipping or sinking, posing serious safety risks.

Proximity to power lines is another critical consideration. Conducting rigging operations too close to overhead power lines increases the risk of electrocution and incidents involving electrical hazards. Keeping a safe distance is crucial to ensuring the safety of the crew and equipment.

In contrast, other options touch on factors that may influence the work environment but do not hold the same level of significance for rigging safety or operational integrity as those identified in the correct answer.