Can someone plsss help me with these two questions

How does a comet change when it comes close to the sun

Hurry what kind of texture will a conglomerate rock have? a. large-grained c. medium-grained b. fine-grained d. coarse-grained select the best answer from the choices provided a b c d

What features of the electoral system support the existence of a two party system and analyze one of these features and explain its role