Explica (y detalla) cuáles son los ecosistemas que están en riesgo en el perú, que flora y fauna habita en dicho ecosistema y cuáles son las causas. ¡ ayudaa, es para mañan!

Which of these statements best describes the st. lawrence seaway? the st. lawrence seaway connects the st. lawrence river with the arctic ocean. the st. lawrence seaway provides an important trading route between the u.s. and mexico. the st. lawrence seaway provides an important trading route for the u.s, but has little value for canada. the st. lawrence seaway connects the great lakes, the st. lawrence river, and the atlantic ocean.

What percentage of light hits earth's surface directly?

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?