Answer:
The phrase: "Esta noche los estudiantes caminarán por la playa" is future.
Step-by-step explanation:
The phrase: "Esta noche los estudiantes caminarán por la playa" is future. In English this means: Tonight the students will walk along the beach. If it was in present it would be: "Hoy los estudiantes caminan por la playa" (Today the students walk along the beach). If it was in the past the phrase would be: "Ayer los estudiantes caminaron por la playa" (Yesterday the students walked along the beach).