Homogamy is marriage between individuals who have different social characteristics.

False

Explanation:

When two individuals belonging to a similar social and cultural background get married, then such a marriage is called as Homogamy.  While when two individuals belonging to a different social and cultural background gets married , then such a marriage is called as heretogamy. Homogamy is a type of assortative mating where union of two individuals is dependent on social factors such as financial status, gender, religion, caste, language, color etc.  

Hence, given statement is false

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).