Question

energy enters an ecosystem as sunlight, is converted by plants into chemical energy, then eventually leaves as heat. which of these best describes energy flow through an ecosystem? a triangular pathway completely random a dead - end pathway a one - way pathway through the ecosystem

Explanation:

Step1: Analyze energy flow

Energy enters as sunlight, is converted (not recycled in same form), and leaves as heat.

Step2: Evaluate options

• Triangular pathway: No such pattern for energy flow.
• Completely random: Energy flow follows a process (sunlight - chemical - heat).
• Dead - end pathway: Incorrect as energy moves through steps (not just stops at one).
• One - way pathway: Matches energy entering, being converted, and leaving (no cycle back as same energy form).

Answer:

D. a one - way pathway through the ecosystem